Cargo Features

acme-types has no features set by default.

[dependencies]
acme-types = { version = "0.1.1", features = ["json"] }
json = serde_json

Enables derive of serde

serde:

Provide derive(Serialize, Deserialize) macros.

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 json?
serde_json json?