{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"//"}]}
    // the tokens inside the delimiters, so `#[some::attr(a b c)]` would have `a b c` inside
struct MetaItemListParserContext<'a, 'sess> {
    inside_delimiters: Peekable<TokenStreamIter<'a>>,