{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"//"}]}
// * Stmts(SmallVec<[ast::Stmt; 1]>)        -> token_tree_to_stmts
// * Ty(P<ast::Ty>)                         -> token_tree_to_ty
// * Items(SmallVec<[P<ast::Item>; 1]>)     -> token_tree_to_items