call(Goal, Key, V1, ...)
is true for all keys in the dicts. At least one of the dicts must be
instantiated.
- Errors
- - instantiation_error if no dict is bound
-type_error(dict, Culprit)
if one of the dict arguments is not a dict.
-domain_error(incompatible_dict, Culprit)
if Culprit does not have the same keys as one of the other dicts.