code: def remove_this_factvalue(self,factvalue_id):
          
          for fact in self.get_factvalues():
              if fact.get_id() == factvalue_id:
                  self.node.remove(fact.get_node())
                  break
docs: Removes the factvalue for the given factvalue identifier
          @type factvalue_id: string
          @param factvalue_id: the factvalue identifier to be removed