destroy method
void
destroy()
Called to free up any resources due to chart going away.
Implementation
void destroy() {
// Walk them in add order to support behaviors that remove other behaviors.
for (var i = 0; i < _behaviorStack.length; i++) {
_behaviorStack[i].removeFrom(this);
}
_behaviorStack.clear();
_behaviorRoleMap.clear();
_selectionModels.values
.forEach((selectionModel) => selectionModel.clearAllListeners());
}