code: def namedb_get_name_at(cur, name, block_number, include_expired=False):
      
      if not include_expired:
          # don't return anything if this name is expired.
          # however, we don't care if the name hasn't been created as of this block_number either, since we might return its preorder (hence only_registered=False)
          name_rec = namedb_get_name(cur, name, block_number, include_expired=False, include_history=False, only_registered=False)
          if name_rec is None:
              # expired at this block.
              return None
  
      history_rows = namedb_get_record_states_at(cur, name, block_number)
      if len(history_rows) == 0:
          # doesn't exist
          return None
      else:
          return history_rows
docs: Get the sequence of states that a name record was in at a particular block height.
      There can be more than one if the name changed during the block.
  
      Returns only unexpired names by default.  Can return expired names with include_expired=True
      Returns None if this name does not exist at this block height.