Cargo Features

StringWrapper has no features set by default.

[dependencies]
string-wrapper = { version = "0.3.0", features = ["use_serde"] }
use_serde = serde, serde_derive

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.

serde use_serde?
serde_derive use_serde?