Function NSNextMapEnumeratorPair 

pub unsafe extern "C-unwind" fn NSNextMapEnumeratorPair(
    enumerator: NonNull<NSMapEnumerator>,
    key: *mut *mut c_void,
    value: *mut *mut c_void,
) -> bool

Available on crate feature NSMapTable only.

Safety

• enumerator must be a valid pointer.
• key must be a valid pointer or null.
• value must be a valid pointer or null.