Function syntax::visit::walk_opt_sp_ident

pub fn walk_opt_sp_ident<'a, V: Visitor<'a>>(
    visitor: &mut V, 
    opt_sp_ident: &Option<Spanned<Ident>>
)

🔬 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?