/// <summary>
 /// Creates an instance of this timespan tick computable.
 /// </summary>
 /// <param name="input">The input node, which output will be used to determine the number of ticks.</param>
 public TimeSpanTikcs(ITimeSpanComputable input)
 {
     Input = input;
 }
 /// <summary>
 /// Creates an instance of the node with the input, which timespan will be negated.
 /// </summary>
 /// <param name="input"></param>
 public NegateTimeSpan(ITimeSpanComputable input)
 {
     Input = input;
 }