Bug 147852 [regression]Combo/listbox parameter doesn't work when put in parameter group
Description: Combo/listbox parameter doesn't work when put in parameter group Steps to reproduce: 1. New a prameter group 2. Insert a textbox parameter 3. Insert a combo/listbox parameter, input several values 4. Preview and select parameter values Expected result: Values can be selected Actual result: Once you selected a value from combo/listbox parameter list, the list would become empty.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ScalarParameterBean.java
*/
	public boolean isRequired( )
	{
		return isRequired;
	}
	
	/**
	 * @param isRequired The isRequired to set.
	 */
	public void setRequired( boolean isRequired )
	{
		this.isRequired = isRequired;
	}
	
	/**
	 * @return the defaultValue
	 */
	public String getDefaultValue( )
	{
		return defaultValue;
	}
	
	/**
	 * @param defaultValue the defaultValue to set
	 */
	public void setDefaultValue( String defaultValue )
	{
		this.defaultValue = defaultValue;
	}		
}