docs: def _add_additional_properties(position, properties_dict):
          """
          Sets AdditionalProperties of the ProbModelXML.
          """
          add_prop = etree.SubElement(position, 'AdditionalProperties')
          for key, value in properties_dict.items():
              etree.SubElement(add_prop, 'Property', attrib={'name': key, 'value': value})