code: def get_names_in_namespace( self, namespace_id, offset=None, count=None ):
          
          if offset is not None and offset < 0:
              offset = None 
  
          if count is not None and count < 0:
              count = None 
  
          cur = self.db.cursor()
          names = namedb_get_names_in_namespace( cur, namespace_id, self.lastblock, offset=offset, count=count )
          return names
docs: Get the set of all registered names in a particular namespace.
          Returns the list of names.