constructor( editor, object = null, attributeName = '', newValue = null ) {

		super( editor );

		this.type = 'SetShadowValueCommand';
		this.name = editor.strings.getKey( 'command/SetShadowValue' ) + ': ' + attributeName;
		this.updatable = true;

		this.object = object;
		this.attributeName = attributeName;
		this.oldValue = ( object !== null ) ? object.shadow[ attributeName ] : null;
		this.newValue = newValue;

	}
@param {Editor} editor
@param {THREE.Object3D|null} object
@param {string} attributeName
@param {number|string|boolean|Object|null} newValue
@constructor