Bug 165657 [2.1.2][Acceptance]Setting &__svg=false doesn't take effects in deployment [0601]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/actionhandler/BirtGetPageAllActionHandler.java
.getBean( );
			assert attrBean != null;
			String format = ParameterAccessor.getFormat( context.getRequest( ) );
			Locale locale = attrBean.getLocale( );
			boolean master = attrBean.isMasterPageContent( );
			Map parameterMap = attrBean.getParameters( );
			Map displayTexts = attrBean.getDisplayTexts( );
			
			if ( operation != null )
			{
				String displayTextParam = null;
				Oprand[] oprands = operation.getOprand( );
				for ( int i = 0; i < oprands.length; i++ )
				{
					String paramName = oprands[i].getName( );
					Object paramValue = oprands[i].getValue( );
					
					if ( ParameterAccessor.PARAM_ISNULL
							.equalsIgnoreCase( paramName )
							&& paramValue != null )
					{
						
						ScalarParameterHandle parameter = (ScalarParameterHandle) attrBean
								.findParameter( paramValue.toString( ) );
						if ( parameter != null )
						{
							
							parameterMap.put( paramValue, null );
							continue;
						}