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 measure group to traverse
	 */
	public void visitMeasureGroup( MeasureGroup obj )
	{
		visitDesignElement( obj );
	}
	/**
	 * Visits the access control element.
	 * 
	 * @param obj
	 *            the access control element
	 */
	public void visitAccessControl( AccessControl obj )
	{
	}
	/**
	 * Visits the value access control element.
	 * 
	 * @param obj
	 *            the value access control element
	 */
	public void visitValueAccessControl( ValueAccessControl obj )
	{
	}
	
	/**
	 * Visits the cube element.
	 *