Cargo Features

[dependencies]
holochain_tracing_macros = { version = "0.0.24", default-features = false, features = ["newrelic-on", "tracing-on"] }
default = tracing-on

The tracing-on feature is set by default whenever holochain_tracing_macros is added without default-features = false somewhere in the dependency tree.

newrelic-on = newrelic
tracing-on default

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.

newrelic newrelic-on?