Delete child nodes on click of button present on parent node

@SmilyArora wrote:

Hi,

I have 2 buttons present on a node :
i) Expand - which makes a REST call, and gets the child nodes for that particular node achieved using:

ii) Collapse - Which will delete the set of nodes we got in step (i).

In step 2 i am not able to delete the set of nodes shown in step 1.
How can we achieve the same ?
My diagram looks something like this :

image.png428×614 27.5 KB

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