Function syntax::fold::noop_fold_parenthesized_parameter_data

pub fn noop_fold_parenthesized_parameter_data<T: Folder>(
    data: ParenthesizedParameterData, 
    fld: &mut T
) -> ParenthesizedParameterData

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?