syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"tcx.closure_captures(parent_def_id).iter().copied(),"}]}
source_snippet:         tcx.closure_captures(parent_def_id).iter().copied(),
context_before:     let field_remapping: UnordMap<_, _> = ty::analyze_coroutine_closure_captures(
context_after:         tcx.closure_captures(coroutine_def_id).iter().skip(num_args).copied(),