{P : Sort u} →
  {toImport : Lean.Import} →
    {irPhases : Lean.IRPhases} →
      {toImport' : Lean.Import} →
        {irPhases' : Lean.IRPhases} →
          { toImport := toImport, irPhases := irPhases } = { toImport := toImport', irPhases := irPhases' } →
            (toImport = toImport' → irPhases = irPhases' → P) → P