WP_Widget_Factory::get_widget_key( string $id_base )

Source

File: wp-includes/class-wp-widget-factory.php

public function get_widget_key( $id_base ) {
		foreach ( $this->widgets as $key => $widget_object ) {
			if ( $widget_object->id_base === $id_base ) {
				return $key;
			}
		}

		return '';
	}