{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"ocx.resolve_regions_and_report_errors(defining_use_anchor,"}]}
    ocx.resolve_regions_and_report_errors(defining_use_anchor, param_env, wf_tys)?;
    let wf_tys = ocx.assumed_wf_types_and_report_errors(param_env, defining_use_anchor)?;