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 theName
	 *            the group name to set
	 */
	public void setName( String theName ) throws NameException
	{
		
		try
		{
			setProperty( GroupElement.GROUP_NAME_PROP, StringUtil
					.trimString( theName ) );
		}
		catch ( NameException e )
		{
			throw e;
		}
		catch ( SemanticException e )
		{
			assert false;
		}
	}
	/**
	 * Sets the group expression.
	 * 
	 * @param expr
	 *            the expression to set
	 * @throws SemanticException
	 *             If the expression is invalid.
	 * 
	 * @see #getKeyExpr()