code: public ORecordIteratorCluster<REC> setRange(final long iFrom, final long iEnd) {
  		firstClusterPosition = iFrom;
  		rangeTo = iEnd;
  		current.clusterPosition = firstClusterPosition;
  		return this;
  	}
docs: Define the range where move the iterator forward and backward.
  
  @param iFrom
  Lower bound limit of the range
  @param iEnd
  Upper bound limit of the range
  @return