protected function _create( $args, $assoc_args, $callback ) {
		unset( $assoc_args[ $this->obj_id_key ] );

		$obj_id = $callback( $assoc_args );

		if ( is_wp_error( $obj_id ) ) {
			WP_CLI::error( $obj_id );
		}

		if ( Utils\get_flag_value( $assoc_args, 'porcelain' ) ) {
			WP_CLI::line( $obj_id );
		} else {
			WP_CLI::success( "Created {$this->obj_type} {$obj_id}." );
		}
	}