private function get_plugin_files( $path ) {
		$folder = dirname( $this->get_absolute_path( $path ) );

		// Return single file plugins immediately, to avoid iterating over the
		// entire plugins folder.
		if ( WP_PLUGIN_DIR === $folder ) {
			return (array) $path;
		}

		return $this->get_files( trailingslashit( $folder ) );
	}