code: public final Bounds getAdmissibleDistanceBounds(TimePoint tpFrom, TimePoint tpTo) {
  		final APSPSolver stpSolver = (APSPSolver) constraintSolvers[0];
  		return stpSolver.getDistanceBounds(tpFrom, tpTo);
  	}
docs: Gets the minimum and maximum allowed distance between a pair of {@link TimePoint}s.
  @param tpFrom the {@link TimePoint} that is considered as the "origin"/source.
  @param tpTo the {@link TimePoint} that is considered as the "target".
  @return Returns the bounds of the distance between the two {@link TimePoint}s
  or <code>null</code> if there is no constraint between the two.