syntax_data: {"ast_node_type":"variable","tokens":[{"end":80,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let poll_did = tcx.require_lang_item(LangItem::Poll, body.span);
context_before:                 // Compute Poll<return_ty>
context_after:                 let poll_adt_ref = tcx.adt_def(poll_did);