syntax_data: {"ast_node_type":"variable","tokens":[{"end":54,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let coroutine_ty = body.local_decls.raw[1].ty;
context_before:         // The first argument is the coroutine type passed by value
context_after:         let coroutine_kind = body.coroutine_kind().unwrap();