public static RotationalStiffness MicronewtonMillimetersPerDegree <T>(this T value) =>
 RotationalStiffness.FromMicronewtonMillimetersPerDegree(Convert.ToDecimal(value));
 public void NumberToMicronewtonMillimetersPerDegreeTest() =>
 Assert.Equal(RotationalStiffness.FromMicronewtonMillimetersPerDegree(2), 2.MicronewtonMillimetersPerDegree());