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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def OnDoubleClick(self, event):
 """Double click on a given square in the map"""

        node = HotMapNavigator.findNodeAtPosition(self.hot_map, event.GetPosition())
        if node:
            wx.PostEvent( self, SquareActivationEvent( node=node, point=event.GetPosition(), map=self ) )