{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"///"}]}
/// `MetaVarExpr` are "first-class" token trees. Useful for parsing macros.
/// Similar to `tokenstream::TokenTree`, except that `Sequence`, `MetaVar`, `MetaVarDecl`, and
#[derive(Debug, PartialEq, Encodable, Decodable)]