Bug 121498 When datasource/dataset deleted, the datasource/dataset property binding element haven't been deleted
When deleted the datasource/dataset, the datasource/dataset property binding element haven't been deleted. Expected result: This operation must be a transaction.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DesignElementHandle.java
}
	/**
	 * Sets the status that identifies whether the element is valid or not.
	 * 
	 * @param isValid
	 *            the status to set
	 */
	public void setValid( boolean isValid )
	{
		getElement( ).setValid( isValid );
	}
	/**
	 * Justifies whether this element has any semantic error or not.
	 * 
	 * @return true if the element has any semantic error, otherwise false
	 */
	public boolean hasSemanticError( )
	{
		return !getSemanticErrors( ).isEmpty( );
	}
	/**
	 * Deeply clones the current design element which is wrapped by the handle.
	 * 
	 * @return the copy of the design element
	 */
	public IDesignElement copy( )
	{
		try
		{
			return (DesignElement) getElement( ).clone( );