private void doCopyColumns() {
		int[] userColumns = promptUserForColumns();
		if (userColumns == null) {
			return; // cancelled
		}

		copyColumns(userColumns);
	}
A method that subclasses can override to signal that they wish not to have this table's
built-in popup actions.   Subclasses will almost never need to override this method.

@return true if popup actions are supported
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/GTable.java