{"ast_node_type":"function","tokens":[{"end":82,"kind":"keyword","start":0,"text":"fn"}]}
    fn from_internal((stream, rustc): (TokenStream, &mut Rustc<'_, '_>)) -> Self {
impl FromInternal<(TokenStream, &mut Rustc<'_, '_>)> for Vec<TokenTree<TokenStream, Span, Symbol>> {
        use rustc_ast::token::*;