function callback(newStyle)
        {
            delete this._parentPane._userOperation;

            if (!newStyle)
                return;
            this._applyNewStyle(newStyle);

            var section = this.section();

            this._updatePane();
            this.styleTextAppliedForTest();
        }
@param {?WebInspector.CSSStyleDeclaration} newStyle
@this {WebInspector.StylePropertyTreeElement}