public function deactivate() {

		$ret = false;

		if ( 'plugin' === $this->get( 'type' ) ) {

			deactivate_plugins( $this->get( 'update_file' ) );
			// Translators: %s = Add-on name.
			return sprintf( __( '%s was successfully deactivated.', 'lifterlms' ), $this->get( 'title' ) );

		}

		// Translators: %s = Add-on name.
		return new WP_Error( 'deactivation', sprintf( __( 'Could not deactivate %s.', 'lifterlms' ), $this->get( 'title' ) ) );

	}