exit status: 1 with stderr:
<stdin>:23:8: error: type 'MyCollection' does not conform to protocol 'MySequenceP' struct MyCollection: MyCollectionP { ^ <stdin>:25:10: note: candidate has non-matching type '() -> MyCustomIterator' [with Iterator = MyDefaultIterator] func makeIterator() -> MyCustomIterator { ^ <stdin>:7:10: note: protocol requires function 'makeIterator()' with type '() -> MyDefaultIterator'; do you want to add a stub? func makeIterator() -> Iterator ^