/// <summary>
/// Determines whether whether a specified interval is contained by the current interval.
/// </summary>
/// <param name="other">The interval to check.</param>
/// <returns>
/// <see langword="true"/> if the specified interval <paramref name="other"/> is inside,
/// and not equal to, the current interval; otherwise, <see langword="false"/>.
/// </returns>
public bool IsProperSupersetOf(Interval <T> other)
{
if (other == null)
{
return(true);
}
return(LowerLimit.LessThan(other.LowerLimit, Position.Lower) &&
UpperLimit.GreaterThan(other.UpperLimit, Position.Upper));
}