{"ast_node_type":"impl","tokens":[{"end":74,"kind":"keyword","start":0,"text":"is_unsafe_node:"}]}
    is_unsafe_node: &impl Fn(AstPtr<Either<ast::Expr, ast::Pat>>) -> bool,
    bindings_shadow_count: Option<&mut FxHashMap<hir::Name, u32>>,
    syntactic_name_ref_highlighting: bool,