code: def values(self):
          
          enm = javabridge.call(self.jobject, "enumerateValues", "()Ljava/util/Enumeration;")
          if enm is None:
              return None
          else:
              return typeconv.enumeration_to_list(enm)
docs: Returns the labels, strings or relation-values.
  
          :return: all the values, None if not NOMINAL, STRING, or RELATION
          :rtype: list