code: def relations():
      
      rels = {}
      for reltype in relation_types():
          relids = {}
          for relid in relation_ids(reltype):
              units = {local_unit(): relation_get(unit=local_unit(), rid=relid)}
              for unit in related_units(relid):
                  reldata = relation_get(unit=unit, rid=relid)
                  units[unit] = reldata
              relids[relid] = units
          rels[reltype] = relids
      return rels
docs: Get a nested dictionary of relation data for all related units