040000 tree 907ac8fee45ed1360e658976869e0a5816bed562	ant
040000 tree a36dfb2b74c961668c701272749a53986d3c3dc2	compiler
040000 tree f20b89e97bd83cfa9fd60f81277281472c9ac8bc	debugger
040000 tree 25fef3f782817ee843548c65bfcb22c643e19808	execution