Cargo Features

juniper-from-schema-code-gen has no features set by default.

[dependencies]
juniper-from-schema-code-gen = { version = "0.5.2", features = ["format-debug-output"] }
format-debug-output = rustfmt-nightly

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.

rustfmt-nightly format-debug-output?