Cargo Features

lfan has no features set by default.

[dependencies]
lfan = { version = "0.2.6", features = ["async"] }
async = tokio

Affects lfan::preconfig.concurrent

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.

tokio async?