WebDevStudios / CMB2

		// default param can be passed a callback as well

		if ( is_callable( $args['default'] ) ) {

			$this->deprecated_param( __CLASS__ . '::__construct()', '2.2.3', self::DEPRECATED_CB_PARAM, 'default', 'default_cb' );

			$args['default_cb'] = $args['default'];

			$args['default'] = null;

		}

		// options param can be passed a callback as well

		if ( is_callable( $args['options'] ) ) {

		}

		// options param can be passed a callback as well

		if ( is_callable( $args['options'] ) ) {

			$this->deprecated_param( __CLASS__ . '::__construct()', '2.2.3', self::DEPRECATED_CB_PARAM, 'options', 'options_cb' );

			$args['options_cb'] = $args['options'];

			$args['options'] = array();

		}

		return $args;

	}