def child_removed(self, child):
        super(WxSplitItem, self).child_removed(child)
        if isinstance(child, WxContainer):
            self.widget.SetSplitWidget(self.split_widget())

    #--------------------------------------------------------------------------
    # ProxySplitItem API
    #--------------------------------------------------------------------------
Unlock the mailbox if it is locked.
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/wx/wx_split_item.py/WxSplitItem.child_removed--crossover with--dataset/ETHPy150Open babble/babble/include/jython/Lib/mailbox.py/_singlefileMailbox.unlock