syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"tcx.closure_captures(coroutine_def_id).iter().skip(num_args).copied(),"}]}
source_snippet:         tcx.closure_captures(coroutine_def_id).iter().skip(num_args).copied(),
context_before:         tcx.closure_captures(parent_def_id).iter().copied(),
context_after:         |(parent_field_idx, parent_capture), (child_field_idx, child_capture)| {