docs: def valid_as_v2_0(voevent):
      """Tests if a voevent conforms to the schema.
  
      Args:
          voevent(:class:`Voevent`): Root node of a VOEvent etree.
      Returns:
          bool: Whether VOEvent is valid
      """
      _return_to_standard_xml(voevent)
      valid_bool = voevent_v2_0_schema.validate(voevent)
      _remove_root_tag_prefix(voevent)
      return valid_bool