code: public static LongBinding max(final ObservableLongValue a, final ObservableLongValue b) {
          return createLongBinding(() -> Math.max(a.get(), b.get()), a, b);
      }
docs: Binding for {@link java.lang.Math#max(long, long)}
  
  @param   a   an argument.
  @param   b   another argument.
  @return  the larger of {@code a} and {@code b}.