syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // The by-move body is just the body :)
context_before:         assert_eq!(field_remapping.len(), tcx.closure_captures(parent_def_id).len());
context_after:         return coroutine_def_id.to_def_id();