docs: def get_file_urls_map(self):
          """stub"""
          file_urls_map = {}
          if self.has_files():
              for label in self.my_osid_object._my_map['fileIds']:
                  label_map = self.my_osid_object._my_map['fileIds'][label]
                  if 'assetContentId' in label_map and bool(label_map['assetContentId']):
                      asset_content = self._get_asset_content(
                          Id(label_map['assetId']),
                          asset_content_id=Id(label_map['assetContentId']))
                  else:
                      asset_content = self._get_asset_content(
                          Id(label_map['assetId']),
                          asset_content_type_str=label_map['assetContentTypeId'])
                  file_urls_map[label] = asset_content.get_url()
              return file_urls_map
          raise IllegalState('no files_map')