Revert "change order of edges"

This reverts commit 6e09317a4de0529575f3414e503e9fa1b3dc7ca0.
Revert "add instance usages"

This reverts commit 3eda6dba35693133bac3247198fc5f6761a0aa0f.
Revert "instance edges now mean that a method was used"

This reverts commit 058c7697d0c06abba897dab673967270a505514b.