public CellRange getCellRange()
	{
		for( Object subRec : subRecs )
		{
			BiffRec br = (BiffRec) subRec;
			if( br.getOpcode() == SXVS )
			{
				if( ((SxVS) br).getSourceType() != SxVS.TYPE_SHEET )
				{
					log.error( "SXSTREAMID.getCellRange:  Pivot Table Data Sources other than Sheet are not supported" );
					return null;
				}
			}
			else if( br.getOpcode() == DCONREF )
			{
				return ((DConRef) br).getCellRange();
			}
			else if( br.getOpcode() == DCONNAME )
			{
				log.error( "SXSTREAMID.getCellRange:  Name sources are not yet supported" );
				return null;
			}
			else if( br.getOpcode() == DCONBIN )
			{
				log.error( "SXSTREAMID.getCellRange:  Name sources are not yet supported" );
				return null;
			}
		}
		return null;
	}