/// <summary>
 /// Creates a new instance of <see cref="T:Gu.Units.Stiffness"/>.
 /// </summary>
 /// <param name="value"></param>
 /// <param name="unit"></param>
 public static Stiffness From(double value, StiffnessUnit unit)
 {
     return(new Stiffness(unit.ToSiUnit(value)));
 }
 /// <summary>
 /// Initializes a new instance of <see cref="T:Gu.Units.Stiffness"/>.
 /// </summary>
 /// <param name="value"></param>
 /// <param name="unit"><see cref="T:Gu.Units.NewtonsPerMetre"/>.</param>
 public Stiffness(double value, StiffnessUnit unit)
 {
     this.newtonsPerMetre = unit.ToSiUnit(value);
 }