040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 2cb219c1b064c13a8782ce112a995356fd468481	protocol
040000 tree 16abd3bb071501ee6d11de054313a0f047d38a3d	types
040000 tree 86e8c98c814c73086accc2e0a3cc8d1a0adf7ff4	util