{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":".param_def_id_to_index[&defaulted_param_def_id.to_def_id()];"}]}
                                    .param_def_id_to_index[&defaulted_param_def_id.to_def_id()];
                                    .generics_of(parent_def_id)
                                param_const.index < defaulted_param_idx