code: public double getTimeToEstimate(int sequenceNumNow, int sequenceNumTo) {
  		double timeCounter = 0.0;
  		for (int i = sequenceNumNow-this.sequenceNumberStart; i <= sequenceNumTo; i++) {
  			timeCounter += this.getDTs()[i];
  		}
  		return timeCounter;
  	}
docs: Get an estimate of the time left to move on this {@link Trajectory}
  between two path indices. The estimate is based on this {@link Trajectory}'s
  temporal profile.
  @param sequenceNumNow The path index from which the estimate should be computed.
  @param sequenceNumTo The path index to which the estimate should be computed.
  @return An estimate of the time left to move on this {@link Trajectory}
  given the current path index.