code: def _merge_many_to_one_field(self, main_infos, prop, result):
          
          title = None
          # We first find the related foreignkey to get the good title
          rel_base = list(prop.local_columns)[0]
          related_fkey_name = rel_base.name
          if not main_infos.get('keep_key', False):
              for val in result:
                  if val['name'] == related_fkey_name:
                      title = val['label']
                      main_infos['label'] = title
                      result.remove(val)
                      break
  
          return main_infos
docs: * Find the foreignkey associated to the current relationship
          * Get its title
          * Remove this fkey field from the export
  
          :param dict main_infos: The datas collected about the relationship
          :param obj prop: The property mapper of the relationship
          :param list result: The actual collected headers
          :returns: a title