Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/ReferenceableElement.java
*            the element name
	 */
	public ReferenceableElement( String theName )
	{
		super( theName );
	}
	/**
	 * Makes a clone of this referencable element. The cloned element has an
	 * empty client list,which is used to point to the clients who reference
	 * this element.
	 * 
	 * @return Object the cloned referencable element.
	 * 
	 * 
	 * @see java.lang.Object#clone()
	 */
	public Object doClone( CopyPolicy policy )
			throws CloneNotSupportedException
	{
		ReferenceableElement element = (ReferenceableElement) super
				.doClone( policy );
		element.clients = new ArrayList( );
		return element;
	}
	/**
	 * Adds a client. Should be called only from
	 * {@link DesignElement#setProperty( ElementPropertyDefn, Object )}.
	 * 
	 * @param client
	 *            The client to add.