Bug 210507 Enhance Report engine to support multiple view
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/EngineIRReader.java
int pageBreakInterval = IOUtil.readInt( in );
				listing.setPageBreakInterval( pageBreakInterval );
				break;
			default :
				readReportItemField( in, listing, fieldType );
		}
	}
	protected void readGroupField( DataInputStream in, GroupDesign group,
			short fieldType ) throws IOException
	{
		switch ( fieldType )
		{
			case FIELD_GROUP_LEVEL :
				int groupLevel = IOUtil.readInt( in );
				group.setGroupLevel( groupLevel );
				break;
			case FIELD_PAGE_BREAK_BEFORE :
				String pageBreakBefore = IOUtil.readString( in );
				group.setPageBreakBefore( pageBreakBefore );
				break;
			case FIELD_PAGE_BREAK_AFTER :
				String pageBreakAfter = IOUtil.readString( in );
				group.setPageBreakAfter( pageBreakAfter );
				break;
			case FIELD_PAGE_BREAK_INSIDE :
				String pageBreakInside = IOUtil.readString( in );
				group.setPageBreakInside( pageBreakInside );
				break;
			case FIELD_HIDE_DETAIL :
				boolean hideDetail = IOUtil.readBool( in );