Cargo Features

newrelic has no features set by default.

[dependencies]
newrelic = { version = "0.2.2", features = ["distributed_tracing", "async"] }
distributed_tracing = libc
async = pin-project

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.

libc distributed_tracing?
pin-project async?

Enables pin-project ^0.4