diff --git a/src/data-structures/binary-tree/binary-tree.ts b/src/data-structures/binary-tree/binary-tree.ts
index ee78907..d43c078 100644
--- a/src/data-structures/binary-tree/binary-tree.ts
+++ b/src/data-structures/binary-tree/binary-tree.ts
@@ -1703,25 +1703,25 @@ export class BinaryTree<
     return output;
   }
 
+  /**
+   * Time Complexity: O(n)
+   * Space Complexity: O(n)
+   *
+   * The function `print` in TypeScript overrides the default print behavior to log a visual
+   * representation of the binary tree to the console.
+   * @param {BinaryTreePrintOptions} [options] - The `options` parameter is used to specify the
+   * printing options for the binary tree. It is an optional parameter that allows you to customize how
+   * the binary tree is printed, such as choosing between different traversal orders or formatting
+   * options.
+   * @param {BTNKeyOrNodeOrEntry<K, V, NODE> | R} beginRoot - The `beginRoot` parameter in the
+   * `override print` method is used to specify the starting point for printing the binary tree. It can
+   * be either a key, a node, an entry, or the root of the tree. If no specific starting point is
+   * provided, the default value is set to
+   */
   override print(options?: BinaryTreePrintOptions, beginRoot: BTNKeyOrNodeOrEntry<K, V, NODE> | R = this._root) {
     console.log(this.toVisual(beginRoot, options));
   }
 
-  protected _dfs<C extends BTNCallback<NODE>>(
-    callback?: C,
-    pattern?: DFSOrderPattern,
-    beginRoot?: BTNKeyOrNodeOrEntry<K, V, NODE> | R,
-    iterationType?: IterationType
-  ): ReturnType<C>[];
-
-  protected _dfs<C extends BTNCallback<NODE | null>>(
-    callback?: C,
-    pattern?: DFSOrderPattern,
-    beginRoot?: BTNKeyOrNodeOrEntry<K, V, NODE> | R,
-    iterationType?: IterationType,
-    includeNull?: boolean
-  ): ReturnType<C>[];
-
   /**
    * Time complexity: O(n)
    * Space complexity: O(n)
diff --git a/test/unit/data-structures/binary-tree/binary-tree.test.ts b/test/unit/data-structures/binary-tree/binary-tree.test.ts
index 067d781..309668e 100644
--- a/test/unit/data-structures/binary-tree/binary-tree.test.ts
+++ b/test/unit/data-structures/binary-tree/binary-tree.test.ts
@@ -319,27 +319,26 @@ describe('BinaryTree', () => {
   it('should isSubtreeBST', () => {
     expect(tree.toVisual()).toBe('');
     tree.addMany([4, 2, 6, 1, 3, 5, 7, 4]);
-    expect(tree.toVisual()).toBe(
+    expect(tree.toVisual()).toBe('N for null\n' +
       '    ___4___    \n' +
-        '   /       \\   \n' +
-        '  _2_     _6_  \n' +
-        ' /   \\   /   \\ \n' +
-        ' 1   3   5   7 \n' +
-        '               \n'
-    );
+      '   /       \\   \n' +
+      '  _2_     _6_  \n' +
+      ' /   \\   /   \\ \n' +
+      ' 1   3   5   7 \n' +
+      '               \n');
     const visualized = tree.toVisual(undefined, { isShowUndefined: true, isShowNull: true, isShowRedBlackNIL: true });
     expect(visualized).toBe(
       'U for undefined\n' +
-        '      N for null\n' +
-        '      S for Sentinel Node(NIL)\n' +
-        '              _______4_______        \n' +
-        '       /               \\       \n' +
-        '    ___2___         ___6___    \n' +
-        '   /       \\       /       \\   \n' +
-        '  _1_     _3_     _5_     _7_  \n' +
-        ' /   \\   /   \\   /   \\   /   \\ \n' +
-        ' U   U   U   U   U   U   U   U \n' +
-        '                               \n'
+      'N for null\n' +
+      'S for Sentinel Node(NIL)\n' +
+      '        _______4_______        \n' +
+      '       /               \\       \n' +
+      '    ___2___         ___6___    \n' +
+      '   /       \\       /       \\   \n' +
+      '  _1_     _3_     _5_     _7_  \n' +
+      ' /   \\   /   \\   /   \\   /   \\ \n' +
+      ' U   U   U   U   U   U   U   U \n' +
+      '                               \n'
     );
 
     expect(tree.isBST(tree.getNode(4), 'RECURSIVE')).toBe(true);