code: public final void setStepSize(final int stepSize) {
          Condition.INSTANCE.ensureAtLeast(stepSize, 1, "The step size must be at least 1");
          Condition.INSTANCE.ensureAtMaximum(stepSize, getRange(),
                  "The step size must be at maximum the range");
          this.stepSize = stepSize;
          setNumber(adaptToStepSize(getNumber()));
      }
docs: Sets the step size, the number should be increased or decreased by when moving the selector
  wheel.
  
  @param stepSize
  The step size, which should be set, as an {@link Integer} value. The value must be
  between at least 1 and at maximum the value of the method
  <code>getRange():int</code>