diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80d7507..4b8d76c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@ All notable changes to this project will be documented in this file.
 - [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 - [`auto-changelog`](https://github.com/CookPete/auto-changelog)
 
-## [v1.52.8](https://github.com/zrwusa/data-structure-typed/compare/v1.51.5...main) (upcoming)
+## [v1.52.9](https://github.com/zrwusa/data-structure-typed/compare/v1.51.5...main) (upcoming)
 
 ### Changes
 
diff --git a/README.md b/README.md
index cf56bb8..192e92d 100644
--- a/README.md
+++ b/README.md
@@ -826,43 +826,43 @@ Version 11.7.9
 [//]: # (No deletion!!! Start of Replace Section)
 <div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>heap</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 add</td><td>6.49</td><td>154.00</td><td>1.90e-4</td></tr><tr><td>100,000 add & poll</td><td>35.79</td><td>27.94</td><td>0.01</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 add</td><td>6.66</td><td>150.18</td><td>2.19e-4</td></tr><tr><td>100,000 add & poll</td><td>35.35</td><td>28.29</td><td>8.55e-4</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>rb-tree</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 add</td><td>85.30</td><td>11.72</td><td>7.38e-4</td></tr><tr><td>100,000 add randomly</td><td>84.77</td><td>11.80</td><td>0.00</td></tr><tr><td>100,000 get</td><td>113.74</td><td>8.79</td><td>0.00</td></tr><tr><td>100,000 iterator</td><td>24.51</td><td>40.80</td><td>0.00</td></tr><tr><td>100,000 add & delete orderly</td><td>152.17</td><td>6.57</td><td>0.01</td></tr><tr><td>100,000 add & delete randomly</td><td>240.78</td><td>4.15</td><td>0.01</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 add</td><td>83.70</td><td>11.95</td><td>4.47e-4</td></tr><tr><td>100,000 add randomly</td><td>85.05</td><td>11.76</td><td>0.00</td></tr><tr><td>100,000 get</td><td>112.86</td><td>8.86</td><td>0.00</td></tr><tr><td>100,000 iterator</td><td>23.62</td><td>42.34</td><td>0.00</td></tr><tr><td>100,000 add & delete orderly</td><td>153.38</td><td>6.52</td><td>0.01</td></tr><tr><td>100,000 add & delete randomly</td><td>232.75</td><td>4.30</td><td>0.00</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>queue</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push</td><td>44.16</td><td>22.64</td><td>0.01</td></tr><tr><td>100,000 push & shift</td><td>6.08</td><td>164.58</td><td>0.00</td></tr><tr><td>Native JS Array 100,000 push & shift</td><td>2240.74</td><td>0.45</td><td>0.17</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push</td><td>46.18</td><td>21.65</td><td>0.01</td></tr><tr><td>100,000 push & shift</td><td>5.40</td><td>185.33</td><td>0.00</td></tr><tr><td>Native JS Array 100,000 push & shift</td><td>2273.18</td><td>0.44</td><td>0.20</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>deque</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push</td><td>20.75</td><td>48.19</td><td>0.00</td></tr><tr><td>1,000,000 push & pop</td><td>26.85</td><td>37.24</td><td>0.00</td></tr><tr><td>1,000,000 push & shift</td><td>27.56</td><td>36.28</td><td>0.00</td></tr><tr><td>100,000 push & shift</td><td>2.61</td><td>382.75</td><td>4.11e-4</td></tr><tr><td>Native JS Array 100,000 push & shift</td><td>2388.65</td><td>0.42</td><td>0.15</td></tr><tr><td>100,000 unshift & shift</td><td>2.50</td><td>399.53</td><td>3.59e-4</td></tr><tr><td>Native JS Array 100,000 unshift & shift</td><td>4343.52</td><td>0.23</td><td>0.30</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push</td><td>20.33</td><td>49.20</td><td>0.00</td></tr><tr><td>1,000,000 push & pop</td><td>26.35</td><td>37.95</td><td>0.00</td></tr><tr><td>1,000,000 push & shift</td><td>28.83</td><td>34.68</td><td>0.00</td></tr><tr><td>100,000 push & shift</td><td>2.55</td><td>392.71</td><td>3.48e-4</td></tr><tr><td>Native JS Array 100,000 push & shift</td><td>2285.23</td><td>0.44</td><td>0.25</td></tr><tr><td>100,000 unshift & shift</td><td>2.53</td><td>395.88</td><td>4.03e-4</td></tr><tr><td>Native JS Array 100,000 unshift & shift</td><td>4063.57</td><td>0.25</td><td>0.22</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>hash-map</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 set</td><td>87.12</td><td>11.48</td><td>0.02</td></tr><tr><td>Native JS Map 1,000,000 set</td><td>211.63</td><td>4.73</td><td>0.03</td></tr><tr><td>Native JS Set 1,000,000 add</td><td>167.62</td><td>5.97</td><td>0.01</td></tr><tr><td>1,000,000 set & get</td><td>78.91</td><td>12.67</td><td>0.02</td></tr><tr><td>Native JS Map 1,000,000 set & get</td><td>295.47</td><td>3.38</td><td>0.03</td></tr><tr><td>Native JS Set 1,000,000 add & has</td><td>267.22</td><td>3.74</td><td>0.07</td></tr><tr><td>1,000,000 ObjKey set & get</td><td>378.26</td><td>2.64</td><td>0.06</td></tr><tr><td>Native JS Map 1,000,000 ObjKey set & get</td><td>344.04</td><td>2.91</td><td>0.06</td></tr><tr><td>Native JS Set 1,000,000 ObjKey add & has</td><td>277.87</td><td>3.60</td><td>0.04</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 set</td><td>210.30</td><td>4.76</td><td>0.03</td></tr><tr><td>Native JS Map 1,000,000 set</td><td>217.28</td><td>4.60</td><td>0.03</td></tr><tr><td>Native JS Set 1,000,000 add</td><td>175.11</td><td>5.71</td><td>0.02</td></tr><tr><td>1,000,000 set & get</td><td>231.89</td><td>4.31</td><td>0.05</td></tr><tr><td>Native JS Map 1,000,000 set & get</td><td>278.86</td><td>3.59</td><td>0.03</td></tr><tr><td>Native JS Set 1,000,000 add & has</td><td>237.24</td><td>4.22</td><td>0.01</td></tr><tr><td>1,000,000 ObjKey set & get</td><td>387.96</td><td>2.58</td><td>0.07</td></tr><tr><td>Native JS Map 1,000,000 ObjKey set & get</td><td>348.73</td><td>2.87</td><td>0.07</td></tr><tr><td>Native JS Set 1,000,000 ObjKey add & has</td><td>295.33</td><td>3.39</td><td>0.04</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>trie</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 push</td><td>42.67</td><td>23.44</td><td>8.55e-4</td></tr><tr><td>100,000 getWords</td><td>82.51</td><td>12.12</td><td>0.00</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 push</td><td>43.24</td><td>23.13</td><td>6.15e-4</td></tr><tr><td>100,000 getWords</td><td>105.06</td><td>9.52</td><td>0.01</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>avl-tree</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 add</td><td>307.42</td><td>3.25</td><td>9.13e-4</td></tr><tr><td>100,000 add randomly</td><td>373.75</td><td>2.68</td><td>0.01</td></tr><tr><td>100,000 get</td><td>172.23</td><td>5.81</td><td>0.00</td></tr><tr><td>100,000 iterator</td><td>25.90</td><td>38.61</td><td>0.00</td></tr><tr><td>100,000 add & delete orderly</td><td>509.58</td><td>1.96</td><td>0.00</td></tr><tr><td>100,000 add & delete randomly</td><td>690.44</td><td>1.45</td><td>0.02</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 add</td><td>309.91</td><td>3.23</td><td>0.01</td></tr><tr><td>100,000 add randomly</td><td>368.42</td><td>2.71</td><td>0.00</td></tr><tr><td>100,000 get</td><td>171.25</td><td>5.84</td><td>0.00</td></tr><tr><td>100,000 iterator</td><td>26.14</td><td>38.25</td><td>0.00</td></tr><tr><td>100,000 add & delete orderly</td><td>511.40</td><td>1.96</td><td>0.00</td></tr><tr><td>100,000 add & delete randomly</td><td>687.43</td><td>1.45</td><td>0.02</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>binary-tree-overall</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>10,000 RBTree add randomly</td><td>7.45</td><td>134.14</td><td>0.00</td></tr><tr><td>10,000 RBTree get randomly</td><td>13.03</td><td>76.74</td><td>1.43e-4</td></tr><tr><td>10,000 RBTree add & delete randomly</td><td>22.62</td><td>44.21</td><td>1.83e-4</td></tr><tr><td>10,000 AVLTree add randomly</td><td>28.44</td><td>35.16</td><td>2.71e-4</td></tr><tr><td>10,000 AVLTree get randomly</td><td>13.02</td><td>76.81</td><td>1.05e-4</td></tr><tr><td>10,000 AVLTree add & delete randomly</td><td>54.46</td><td>18.36</td><td>0.00</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>10,000 RBTree add randomly</td><td>7.30</td><td>136.94</td><td>9.11e-5</td></tr><tr><td>10,000 RBTree get randomly</td><td>12.92</td><td>77.41</td><td>1.62e-4</td></tr><tr><td>10,000 RBTree add & delete randomly</td><td>22.42</td><td>44.60</td><td>3.28e-4</td></tr><tr><td>10,000 AVLTree add randomly</td><td>28.34</td><td>35.29</td><td>3.30e-4</td></tr><tr><td>10,000 AVLTree get randomly</td><td>12.94</td><td>77.27</td><td>8.60e-5</td></tr><tr><td>10,000 AVLTree add & delete randomly</td><td>52.35</td><td>19.10</td><td>5.13e-4</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>directed-graph</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000 addVertex</td><td>0.10</td><td>1.01e+4</td><td>8.01e-7</td></tr><tr><td>1,000 addEdge</td><td>6.06</td><td>165.03</td><td>2.89e-4</td></tr><tr><td>1,000 getVertex</td><td>0.10</td><td>1.05e+4</td><td>9.35e-7</td></tr><tr><td>1,000 getEdge</td><td>23.80</td><td>42.02</td><td>0.00</td></tr><tr><td>tarjan</td><td>193.59</td><td>5.17</td><td>0.01</td></tr><tr><td>topologicalSort</td><td>148.99</td><td>6.71</td><td>0.01</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000 addVertex</td><td>0.09</td><td>1.07e+4</td><td>8.73e-7</td></tr><tr><td>1,000 addEdge</td><td>5.98</td><td>167.36</td><td>1.15e-4</td></tr><tr><td>1,000 getVertex</td><td>0.09</td><td>1.05e+4</td><td>8.10e-7</td></tr><tr><td>1,000 getEdge</td><td>23.42</td><td>42.69</td><td>0.00</td></tr><tr><td>tarjan</td><td>210.66</td><td>4.75</td><td>0.04</td></tr><tr><td>topologicalSort</td><td>152.36</td><td>6.56</td><td>0.01</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>doubly-linked-list</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push</td><td>191.05</td><td>5.23</td><td>0.04</td></tr><tr><td>1,000,000 unshift</td><td>186.38</td><td>5.37</td><td>0.06</td></tr><tr><td>1,000,000 unshift & shift</td><td>151.27</td><td>6.61</td><td>0.00</td></tr><tr><td>1,000,000 addBefore</td><td>267.57</td><td>3.74</td><td>0.07</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push</td><td>196.74</td><td>5.08</td><td>0.04</td></tr><tr><td>1,000,000 unshift</td><td>172.87</td><td>5.78</td><td>0.01</td></tr><tr><td>1,000,000 unshift & shift</td><td>151.32</td><td>6.61</td><td>0.01</td></tr><tr><td>1,000,000 addBefore</td><td>262.75</td><td>3.81</td><td>0.07</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>singly-linked-list</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push & shift</td><td>163.01</td><td>6.13</td><td>0.03</td></tr><tr><td>10,000 push & pop</td><td>246.05</td><td>4.06</td><td>0.04</td></tr><tr><td>10,000 addBefore</td><td>275.54</td><td>3.63</td><td>0.01</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push & shift</td><td>164.52</td><td>6.08</td><td>0.03</td></tr><tr><td>10,000 push & pop</td><td>234.45</td><td>4.27</td><td>0.01</td></tr><tr><td>10,000 addBefore</td><td>275.79</td><td>3.63</td><td>0.00</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>priority-queue</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 add</td><td>30.54</td><td>32.75</td><td>0.00</td></tr><tr><td>100,000 add & poll</td><td>89.20</td><td>11.21</td><td>0.00</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>100,000 add</td><td>30.74</td><td>32.53</td><td>0.00</td></tr><tr><td>100,000 add & poll</td><td>88.16</td><td>11.34</td><td>4.14e-4</td></tr></table></div>
     </div><div class="json-to-html-collapse clearfix 0">
       <div class='collapsible level0' ><span class='json-to-html-label'>stack</span></div>
-      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push</td><td>40.42</td><td>24.74</td><td>0.00</td></tr><tr><td>1,000,000 push & pop</td><td>47.90</td><td>20.88</td><td>0.01</td></tr></table></div>
+      <div class="content"><table style="display: table; width:100%; table-layout: fixed;"><tr><th>test name</th><th>time taken (ms)</th><th>executions per sec</th><th>sample deviation</th></tr><tr><td>1,000,000 push</td><td>42.80</td><td>23.37</td><td>0.01</td></tr><tr><td>1,000,000 push & pop</td><td>48.13</td><td>20.78</td><td>0.01</td></tr></table></div>
     </div>
 
 [//]: # (No deletion!!! End of Replace Section)
diff --git a/package-lock.json b/package-lock.json
index c105589..fec06f5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "data-structure-typed",
-  "version": "1.52.8",
+  "version": "1.52.9",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "data-structure-typed",
-      "version": "1.52.8",
+      "version": "1.52.9",
       "license": "MIT",
       "devDependencies": {
         "@eslint/compat": "^1.2.2",
diff --git a/package.json b/package.json
index 59d4621..4cc4bae 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "data-structure-typed",
-  "version": "1.52.8",
+  "version": "1.52.9",
   "description": "Javascript Data Structure. Heap, Binary Tree, Red Black Tree, Linked List, Deque, Trie, HashMap, Directed Graph, Undirected Graph, Binary Search Tree(BST), AVL Tree, Priority Queue, Graph, Queue, Tree Multiset, Singly Linked List, Doubly Linked List, Max Heap, Max Priority Queue, Min Heap, Min Priority Queue, Stack. Benchmark compared with C++ STL. API aligned with ES6 and Java.util. Usability is comparable to Python",
   "main": "dist/cjs/index.js",
   "module": "dist/mjs/index.js",
diff --git a/src/data-structures/binary-tree/avl-tree-multi-map.ts b/src/data-structures/binary-tree/avl-tree-multi-map.ts
index b715882..9e76f9e 100644
--- a/src/data-structures/binary-tree/avl-tree-multi-map.ts
+++ b/src/data-structures/binary-tree/avl-tree-multi-map.ts
@@ -12,7 +12,6 @@ import type {
   BinaryTreeDeleteResult,
   BSTNKeyOrNode,
   BTNKeyOrNodeOrEntry,
-  BTNPredicate,
   IterationType,
   BTNEntry
 } from '../../types';
diff --git a/src/data-structures/binary-tree/avl-tree.ts b/src/data-structures/binary-tree/avl-tree.ts
index 2e05bdb..ecae1a4 100644
--- a/src/data-structures/binary-tree/avl-tree.ts
+++ b/src/data-structures/binary-tree/avl-tree.ts
@@ -13,7 +13,6 @@ import type {
   BinaryTreeDeleteResult,
   BSTNKeyOrNode,
   BTNKeyOrNodeOrEntry,
-  BTNPredicate,
   BTNEntry
 } from '../../types';
 import { IBinaryTree } from '../../interfaces';
diff --git a/src/data-structures/binary-tree/bst.ts b/src/data-structures/binary-tree/bst.ts
index 9626c75..51ea753 100644
--- a/src/data-structures/binary-tree/bst.ts
+++ b/src/data-structures/binary-tree/bst.ts
@@ -14,7 +14,6 @@ import type {
   BTNEntry,
   BTNKeyOrNodeOrEntry,
   BTNPredicate,
-  BTNPureKeyOrNodeOrEntry,
   Comparator,
   CP,
   DFSOrderPattern,
diff --git a/src/data-structures/binary-tree/rb-tree.ts b/src/data-structures/binary-tree/rb-tree.ts
index a196770..e0eeb95 100644
--- a/src/data-structures/binary-tree/rb-tree.ts
+++ b/src/data-structures/binary-tree/rb-tree.ts
@@ -1,7 +1,6 @@
 import type {
   BinaryTreeDeleteResult,
   BTNKeyOrNodeOrEntry,
-  BTNPredicate,
   CRUD,
   OptBSTN,
   RBTNColor,
diff --git a/src/data-structures/binary-tree/tree-multi-map.ts b/src/data-structures/binary-tree/tree-multi-map.ts
index 827e86a..fc248bd 100644
--- a/src/data-structures/binary-tree/tree-multi-map.ts
+++ b/src/data-structures/binary-tree/tree-multi-map.ts
@@ -9,7 +9,6 @@ import type {
   BinaryTreeDeleteResult,
   BSTNKeyOrNode,
   BTNKeyOrNodeOrEntry,
-  BTNPredicate,
   IterationType,
   OptBSTN,
   RBTNColor,