Bug 168172 Add the get() and set() functions of HideDetail parameter on IGroup
Add the get() and set() functions of HideDetail parameter on IGroup, and thus enable the hidedetail shifting on the Group through eventhandler.
engine/org.eclipse.birt.report.engine.tests/test/org/eclipse/birt/report/engine/api/script/element/ElementTest.java
assertEquals( VALUE, dataSet.getPrivateDriverProperty( KEY ) );
		dataSet.setQueryText( QUERY );
		assertEquals( QUERY, dataSet.getQueryText( ) );
	}
	public void testDataSource( ) throws ScriptException
	{
		DataSourceHandle dataSourceHandle = factory.newOdaDataSource(
				DATA_SOURCE, null );
		IDataSource dataSource = new DataSource( dataSourceHandle );
		dataSource.setPrivateDriverProperty( KEY, VALUE );
		assertEquals( VALUE, dataSource.getPrivateDriverProperty( KEY ) );
	}
	public void testDynamicText( ) throws ScriptException
	{
		TextDataHandle textDataHandle = factory.newTextData( TEXT_DATA );
		IDynamicText dynamicText = new DynamicText( textDataHandle );
		dynamicText
				.setContentType( DesignChoiceConstants.TEXT_CONTENT_TYPE_HTML );
		assertEquals( DesignChoiceConstants.TEXT_CONTENT_TYPE_HTML, dynamicText
				.getContentType( ) );
		try
		{
			dynamicText.setContentType( TEST );
			fail( "\"test\" should not be a valid content type" );
		}
		catch ( ScriptException e )
		{
			
			
		}