040000 tree 621fbfc7d79bde19908c7daaae229b8f5adcb9b3	android
040000 tree 2bce1f37e4eaf1a51db24d1eb047688bcd99efdf	darwin
040000 tree d9c5cf444a7208ebe5eb68583bb9b4838fc376cb	fuchsia
040000 tree 520ccbde8be48381c65084dd04096c21cb556aec	linux
040000 tree c61c0af7b410bd1a4cac41a2afa1bf268b16f02e	posix
040000 tree d8a110cd022c34746b6717324e716f6ffda0b012	win