Cargo Features

LruCache has no features set by default.

[dependencies]
lru-cache = { version = "0.1.2", features = ["heapsize_impl"] }
heapsize_impl = heapsize

Enables heapsize_impl of linked-hash-map

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

heapsize heapsize_impl?