Cargo Features

ConcurrentMap has no features set by default.

concurrent-map = { version = "5.0.33", features = ["fault_injection", "fuzz_constants", "serde"] }
fault_injection = rand
timing print_utilization_on_drop fuzz_constants

Enables serde

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.

rand fault_injection?