diff --git a/editor/tree_search.cpp b/editor/tree_search.cpp
index ae775b5..4249dfa 100644
--- a/editor/tree_search.cpp
+++ b/editor/tree_search.cpp
@@ -114,7 +114,7 @@ void TreeSearch::_highlight_tree_item(TreeItem *p_tree_item) {
 	}
 
 	// if the cached draw method is already applied, do nothing.
-	if (callable_cache.has(p_tree_item) && parent_draw_method == callable_cache.get(p_tree_item)){
+	if (callable_cache.has(p_tree_item) && parent_draw_method == callable_cache.get(p_tree_item)) {
 		return;
 	}
 
@@ -138,7 +138,7 @@ void TreeSearch::_highlight_tree_item(TreeItem *p_tree_item) {
 }
 
 // custom draw callback for highlighting (bind the parent_drw_method to this)
-void TreeSearch::_draw_highlight_item(TreeItem *p_tree_item, Rect2 p_rect, Callable p_parent_draw_method) {
+void TreeSearch::_draw_highlight_item(TreeItem *p_tree_item, const Rect2 p_rect, const Callable p_parent_draw_method) {
 	if (!p_tree_item) {
 		return;
 	}
@@ -250,12 +250,12 @@ void TreeSearch::_update_number_matches() {
 	}
 }
 
-String TreeSearch::_get_search_mask() {
+String TreeSearch::_get_search_mask() const {
 	ERR_FAIL_COND_V(!search_panel, "");
 	return search_panel->get_text();
 }
 
-void TreeSearch::_find_matching_entries(TreeItem *p_tree_item, const String &p_search_mask, Vector<TreeItem *> &p_accum) {
+void TreeSearch::_find_matching_entries(TreeItem *p_tree_item, const String &p_search_mask, Vector<TreeItem *> &p_accum) const {
 	if (!p_tree_item) {
 		return;
 	}
@@ -381,7 +381,7 @@ void TreeSearch::_select_next_match() {
 }
 
 template <typename T>
-inline bool TreeSearch::_vector_has_bsearch(Vector<T *> p_vec, T *element) {
+inline bool TreeSearch::_vector_has_bsearch(Vector<T *> &p_vec, T *element) const {
 	int idx = p_vec.bsearch(element, true);
 	bool in_array = idx >= 0 && idx < p_vec.size();
 
@@ -517,7 +517,7 @@ TreeSearch::TreeSearchMode TreeSearchPanel::get_search_mode() {
 	return TreeSearch::TreeSearchMode::FILTER;
 }
 
-String TreeSearchPanel::get_text() {
+String TreeSearchPanel::get_text() const {
 	if (!line_edit_search) {
 		return String();
 	}
diff --git a/editor/tree_search.h b/editor/tree_search.h
index 21ff51f..6e6ea32 100644
--- a/editor/tree_search.h
+++ b/editor/tree_search.h
@@ -75,22 +75,23 @@ private:
 	void _highlight_tree_item(TreeItem *p_tree_item);
 
 	// Custom draw-Callback (bind inherited Callable).
-	void _draw_highlight_item(TreeItem *p_tree_item, Rect2 p_rect, Callable p_parent_draw_method);
+	void _draw_highlight_item(TreeItem *p_tree_item, const Rect2 p_rect, const Callable p_parent_draw_method);
 
 	void _update_matching_entries(const String &p_search_mask);
 	void _update_ordered_tree_items(TreeItem *p_tree_item);
 	void _update_number_matches();
 
-	void _find_matching_entries(TreeItem *p_tree_item, const String &p_search_mask, Vector<TreeItem *> &p_accum);
-	String _get_search_mask();
+	void _find_matching_entries(TreeItem *p_tree_item, const String &p_search_mask, Vector<TreeItem *> &p_accum) const;
+	String _get_search_mask() const;
 	StringSearchIndices _substring_bounds(const String &p_searchable, const String &p_search_mask) const;
 
 	void _select_item(TreeItem *p_item);
 	void _select_first_match();
 	void _select_next_match();
 
+	// TODO: make p_vec `const` once Vector::bsearch is const. See: https://github.com/godotengine/godot/pull/90341
 	template <typename T>
-	bool _vector_has_bsearch(Vector<T *> p_vec, T *element);
+	bool _vector_has_bsearch(Vector<T *> &p_vec, T *element) const;
 
 protected:
 	static void _bind_methods() {}
@@ -121,8 +122,7 @@ private:
 	CheckBox *check_button_filter_highlight;
 	void _initialize_controls();
 	void _add_spacer(float width_multiplier = 1.f);
-
-	void _on_draw_highlight(TreeItem *p_item, Rect2 p_rect);
+	
 	void _notification(int p_what);
 
 protected:
@@ -130,7 +130,7 @@ protected:
 
 public:
 	TreeSearch::TreeSearchMode get_search_mode();
-	String get_text();
+	String get_text() const;
 	void show_and_focus();
 	TreeSearchPanel();
 };