Bug 161174 Expect to set/get interval range with a 'String' param in GroupHandle.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/GroupHandle.java
implements
			IGroupElementModel
{
	/**
	 * Constructs a group handle with the given design and the design element.
	 * The application generally does not create handles directly. Instead, it
	 * uses one of the navigation methods available on other element handles.
	 * 
	 * @param module
	 *            the module
	 * @param element
	 *            the model representation of the element
	 */
	public GroupHandle( Module module, DesignElement element )
	{
		super( module, element );
	}
	/**
	 * Returns the header slot in the group. The header slot represents
	 * subsections that print at the start of the group.
	 * 
	 * @return a slot handle to the header
	 */
	public SlotHandle getHeader( )
	{
		return getSlot( GroupElement.HEADER_SLOT );
	}
	/**
	 * Returns the footer slot. The footer slot represents subsections that
	 * print at the end of the group.