/// <summary>
 /// Determines whether a range is contained by a specified range.
 /// </summary>
 /// <param name="a">The specified range to locate in the range.</param>
 /// <param name="b">The range in which to locate the specified range.</param>
 /// <typeparam name="T">The type of the elements of <paramref name="a"/>.</typeparam>
 /// <returns>
 /// <value>true</value> if the range contains the specified range; otherwise, <value>false</value>.
 /// </returns>
 public static bool ContainedBy <T>(this NpgsqlRange <T> a, NpgsqlRange <T> b) where T : IComparable <T> => b.Contains(a);