Revert "Attempt using TreePath instead of Key"
Revert "Attempt using TreePath instead of Key"

This reverts commit 2848e04b480e02bfd3666f382d8c3b53faaa7ec9.

sourcegraph/srclib-csharp,YoloDev/srclib-csharp,sourcegraph/srclib-csharp,YoloDev/srclib-csharp,ildarisaev/srclib-csharp,ildarisaev/srclib-csharp