code: public BeanComparator nullHigh() {
          BeanComparator bc = new BeanComparator(this);
          bc.mOrderByName = mOrderByName;
          bc.mUsingComparator = mUsingComparator;
          bc.mFlags = mFlags ^ ((mFlags & 0x01) << 1);
          return bc;
      }
docs: Set the order of comparisons against null as being high (the default)
  on just the last {@link #orderBy order-by} property. If no order-by
  properties have been specified, then null high order is applied to the
  compared beans. Null high order is the default for consistency with the
  high ordering of {@link Float#NaN NaN} by
  {@link Float#compareTo(Float) Float}.
  <p>
  Calling 'nullHigh, reverse' is equivalent to calling 'reverse, nullLow'.