docs: def dumps(voevent, pretty_print=False, xml_declaration=True, encoding='UTF-8'):
      """Converts voevent to string.
  
      .. note:: Default encoding is UTF-8, in line with VOE2.0 schema.
          Declaring the encoding can cause diffs with the original loaded VOEvent,
          but I think it's probably the right thing to do (and lxml doesn't
          really give you a choice anyway).
  
      Args:
          voevent (:class:`Voevent`): Root node of the VOevent etree.
          pretty_print (bool): indent the output for improved human-legibility
              when possible. See also:
              http://lxml.de/FAQ.html#why-doesn-t-the-pretty-print-option-reformat-my-xml-output
          xml_declaration (bool): Prepends a doctype tag to the string output,
              i.e. something like ``<?xml version='1.0' encoding='UTF-8'?>``
      Returns:
          bytes: Bytestring containing raw XML representation of VOEvent.
  
      """
      vcopy = copy.deepcopy(voevent)
      _return_to_standard_xml(vcopy)
      s = etree.tostring(vcopy, pretty_print=pretty_print,
                         xml_declaration=xml_declaration,
                         encoding=encoding)
      return s