Sets the minimum pixmap size that will be displayed to the user
        for the dock widget.
        
        :param     size | <int>

def setMinimumPixmapSize(self, size):
        """
        Sets the minimum pixmap size that will be displayed to the user
        for the dock widget.
        
        :param     size | <int>
        """
        self._minimumPixmapSize = size
        position = self.position()
        self._position = None
        self.setPosition(position)