code: public void setMinorTickSpace(final double SPACE) {
          if (null == minorTickSpace) {
              _minorTickSpace = SPACE;
              fireUpdateEvent(RECALC_EVENT);
          } else {
              minorTickSpace.set(SPACE);
          }
      }
docs: Defines the value that represents the space between major
  tickmarks. This value will be automatically set by the
  autoscale property. Be careful when changing it manually.
  
  @param SPACE