Sets the maximum pixmap size for this toolbar.
        
        :param     size | <int>

def setMaximumPixmapSize(self, size):
        """
        Sets the maximum pixmap size for this toolbar.
        
        :param     size | <int>
        """
        self._maximumPixmapSize = size
        position = self.position()
        self._position = None
        self.setPosition(position)