public void computeDeltaChange(Double delta, int iPosition, int jPosition) {
ITrajectory1D itrajectory = (ITrajectory1D) ((IConfig1D) config).getDimensionX()
.getRangesXList().get(jPosition).getTrajectoriesList().get(iPosition);
Trajectory1DImpl trajectoryImpl = getPartialTrajectory(itrajectory);
trajectoryImpl.setDelta(delta);
ITrajectory1D result = (ITrajectory1D) Config1DApi.computeDeltaChange(trajectoryImpl);
IRange1D resultRange = result.getRange();
IRange1D range = itrajectory.getRange();