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
* @param value
	 *            <code>true</code> if repeat the headings, otherwise
	 *            <code>false</code>.
	 * @throws SemanticException
	 *             if the property is locked.
	 */
	public void setRepeatHeader( boolean value ) throws SemanticException
	{
		setProperty( REPEAT_HEADER_PROP, Boolean.valueOf( value ) );
	}
	/**
	 * Gets page break after property value of this group.
	 * 
	 * @return page break after property value of this group.
	 */
	public String getPageBreakAfter( )
	{
		return getStringProperty( Style.PAGE_BREAK_AFTER_PROP );
	}
	/**
	 * Sets page break after property value of this group.
	 * 
	 * @param value
	 *            value of page break after property
	 * @throws SemanticException
	 *             if the property is locked.
	 */
	public void setPageBreakAfter( String value ) throws SemanticException
	{
		setProperty( Style.PAGE_BREAK_AFTER_PROP, value );