Returns a mutable array proxy that provides read-write access to an ordered to-many relationship specified by a given key.
- iOS 2.0+
- macOS 10.3+
- tvOS 9.0+
- watchOS 2.0+
The name of an ordered to-many relationship.
A mutable array proxy that provides read-write access to the ordered to-many relationship specified by
Objects added to the mutable array become related to the receiver, and objects removed from the mutable array become unrelated. The default implementation recognizes the same simple accessor methods and array accessor methods as
value(for, and follows the same direct instance variable access policies, but always returns a mutable collection proxy object instead of the immutable collection that
value(for would return.