Cargo Features
FnMeta has no features set by default.
[dependencies]
fn_meta = { version = "0.7.3", features = ["fn_meta_ext", "high_arg_count"] }- fn_meta_ext = smallvec
- high_arg_count
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.