public function is_active() {

		if ( $this->is_installable() && $this->is_installed() ) {

			$file = $this->get( 'update_file' );
			$type = $this->get_type();
			if ( 'plugin' === $type ) {
				return is_plugin_active( $file );
			} elseif ( 'theme' === $type ) {
				$theme = wp_get_theme();
				return ( $file === $theme->get_stylesheet() );
			}
		}

		return false;

	}