I'm trying to figure out how caching works in case of

bootstrap_jvm_tools

. I can see where write to cache is occur: https://github.com/pantsbuild/pants/blob/369da95dc6f4dd7b3d67b7b2cc9fb82b32457eb0/src/python/pants/backend/jvm/tasks/bootstrap_jvm_tools.py#L274, but how read from cache is working?