040000 tree d6a9aa1cc71f7539352ee994055739819ffd5d5b	concepts.callable
040000 tree ae26bba0358ab2b0e3e0388ac65614198799c70b	concepts.compare
040000 tree 895ad47271cccf15db53128c08c2fd6e84c020e5	concepts.lang
040000 tree 01a4fdd0c65b00d557313bbd75b07d83cda7cd4f	concepts.object