@Override
    public final Long next() {
        checkState(mNext, "IAxis.next() must be called exactely once after hasNext()" + " evaluated to true.");
        mKey = mRTX.getNode().getDataKey();
        mNext = false;
        return mKey;
    }
@ Override public final Long next ( ) { checkState ( mNext , "IAxis.next() must be called exactely once after hasNext()" + " evaluated to true." ) ; mKey = mRTX . getNode ( ) . getDataKey ( ) ; mNext = false ; return mKey ; }
{@inheritDoc}