Copy data from **source** into this layer.
        Refer to :meth:`BaseLayer.copy` for a list
        of values that will be copied.

def copyData(self, source):
        """
        Copy data from **source** into this layer.
        Refer to :meth:`BaseLayer.copy` for a list
        of values that will be copied.
        """
        super(BaseLayer, self).copyData(source)
        for name in source.keys():
            glyph = self.newGlyph(name)
            glyph.copyData(source[name])