Cargo Features

SG has no features set by default.

[dependencies]
sg = { version = "0.3.0", features = ["polling"] }
polling = mio

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.

mio polling?

Enables mio ^0.6.16