Bug 184762 BIRT Model - Enhancments to the level defintion
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/ElementVisitor.java
* 
	 * @param obj
	 *            the joint data set to traverse
	 */
	public void visitJointDataSet( JointDataSet obj )
	{
		visitDataSet( obj );
	}
	/**
	 * Visits the cube element.
	 * 
	 * @param obj
	 *            the cube element to traverse
	 */
	public void visitCube( Cube obj )
	{
		visitDesignElement( obj );
	}
	/**
	 * Visists the dimension element.
	 * 
	 * @param obj
	 *            the dimension element to traverse
	 */
	public void visitDimension( Dimension obj )
	{
		visitDesignElement( obj );
	}
	/**
	 * Visists the hierarchy element.