Return the information summary for an Element. This consists
        of the dotted name followed by an value dimension names.

def element_info(cls_or_slf, node, siblings, level, value_dims):
        """
        Return the information summary for an Element. This consists
        of the dotted name followed by an value dimension names.
        """
        info = cls_or_slf.component_type(node)
        if len(node.kdims) >= 1:
            info += cls_or_slf.tab + '[%s]' % ','.join(d.name for d in node.kdims)
        if value_dims and len(node.vdims) >= 1:
            info += cls_or_slf.tab + '(%s)' % ','.join(d.name for d in node.vdims)
        return level, [(level, info)]