How to override select all checkbox with a custom input in ngx-treeView?

[alabanu]

I am using ngx-treeView "select all" functionality and I want to use a custom input or slide button to override select all event.
Stackblitz

Thanks in advance

[majid99h]

pass treeview data in this function

checkAll(items) {
  items.forEach((element: any) => {
    element.checked = true;
    element.collapsed = true;
    if (element.internalChildren) {
      this.checkAll(element.internalChildren);
    }
  });
}