function mxVisibleChange(a,b,c){this.model=a;this.cell=b;this.previous=this.visible=c}mxVisibleChange.prototype.execute=function(){null!=this.cell&&(this.visible=this.previous,this.previous=this.model.visibleStateForCellChanged(this.cell,this.previous))};function mxCellAttributeChange(a,b,c){this.cell=a;this.attribute=b;this.previous=this.value=c}