Cargo Features

aingle_middleware_bytes has no features set by default.

[dependencies]
aingle_middleware_bytes = { version = "0.0.3", features = ["trace"] }
trace = tracing

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.

tracing trace?