syntax_data: {"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let drop_instance = InstanceKind::DropGlue(drop_in_place, Some(coroutine_ty));
context_before:     let drop_in_place = tcx.require_lang_item(LangItem::DropInPlace, body.span);