{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"tcx.def_span(impl_param_def_id),"}]}
                    tcx.def_span(impl_param_def_id),
                multispan.push_span_label(
                    format!("`{}` is early-bound", tcx.item_name(impl_param_def_id)),