MLDictionaryConstraint The constraint on the keys for a dictionary feature. Declarationclass MLDictionaryConstraint TopicsAccessing the constraintkeyTypeInitializersinit(coder:) RelationshipsInherits FromNSObjectConforms ToCVarArgCustomDebugStringConvertibleCustomStringConvertibleEquatableHashableNSCodingNSObjectProtocolNSSecureCoding See AlsoAccessing feature constraintsstateConstraintimageConstraintMLImageConstraintdictionaryConstraintmultiArrayConstraintMLMultiArrayConstraintsequenceConstraintMLSequenceConstraint