if (index != -1) {
	ERR_FAIL_INDEX(index, (int)edited_shaders.size());
	TextShaderEditor *editor = Object::cast_to<TextShaderEditor>(edited_shaders[index].shader_editor);
	if (editor) {
		editor->get_code_editor()->update_toggle_files_button();
	} else {
		VisualShaderEditor *vs_editor = Object::cast_to<VisualShaderEditor>(edited_shaders[index].shader_editor);
		if (vs_editor) {
			vs_editor->update_toggle_files_button();
		}
	}
}

if (index != -1) {
	ERR_FAIL_INDEX(index, (int)edited_shaders.size());
	ShaderEditor *shader_editor = edited_shaders[index].shader_editor;
	ERR_FAIL_NULL(shader_editor);
	shader_editor->update_toggle_files_button();
}