syntax_data: {"ast_node_type":"variable","tokens":[{"end":35,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let resume_local = CTX_ARG;
context_before:         // state. After the yield the slot in the coroutine state would then be uninitialized.
context_after:         let resume_ty = body.local_decls[resume_local].ty;