040000 tree 766e6906ca8226a3ce0e5296ceab12fc8fc654a4	exceptions
040000 tree 23a5515eb8157b751c202c644eb125a7bb9b4c9c	protocol
040000 tree f5e73d3a795884af4507a0ffdcd6f4c5a063d4cd	types
040000 tree 2106bb56dba34e14b6ac34f535fcf475f4358993	util