constructor( propertyId, defaultValue = null ) {

		super( propertyId, defaultValue, true );

		/**
		 * @type {any}
		 * @internal
		 */
		this._input = 'auto';

		/**
		 *
		 * @type {boolean}
		 * @internal
		 */
		this._auto = true;

		/**
		 *
		 * @type {boolean}
		 * @internal
		 */
		this._relative = false;

		this._updateRequired = true;



	}
@param {string} propertyId
@param {number} defaultValue