public function get_collection_params() {

		$query_params = parent::get_collection_params();

		$query_params['post_id'] = array(
			'description'       => __( 'Retrieve access plans for a specific list of one or more posts. Accepts a course/membership id or comma separated list of course/membership ids.', 'lifterlms' ),
			'type'              => 'array',
			'items'             => array(
				'type' => 'integer',
			),
			'validate_callback' => 'rest_validate_request_arg',
		);

		return $query_params;
	}