How do I get the minus and plus-size monitoring events on the left side of the groupTable group?

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#1

Snipaste_2021-02-22_09-35-21

#3

Hello,

Unfortunately, GroupTable does not provide ability to handle user’s clicks on expand/collapse button, so I’ve created and issue: cuba-platform/cuba#3157.

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#5

Thank you, I would have liked to get the currently expanded leaf node, I used reflection to get the results of the getItemIds execution, has achieved this function!
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