if(this.canvas.list.areItemsOfTheSameList({element1: parent1, element2: parent2})) {
this.canvas.list.extractItems({element1: parent1, element2: parent2});
} else if(!cursor.isSelecting()) {
if(this.canvas.list.areItemsOfTheSameList({element1: parent1, element2: parent2})) {
this.canvas.list.extractItems({element1: parent1, element2: parent2});
} else if(!cursor.isSelecting()) {