Bug 211786 [DataBinding] ComputedList refinements
Patch to follow which refines how staleness is handled with ComputedList's dependencies.
bundles/org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/list/ComputedList.java
this(Realm.getDefault(), null);
	}
	/**
	 * Creates a computed list in the default realm and with the given element
	 * type.
	 * 
	 * @param elementType
	 *            the element type, may be <code>null</code> to indicate
	 *            unknown element type
	 */
	public ComputedList(Object elementType) {
		this(Realm.getDefault(), elementType);
	}
	/**
	 * Creates a computed list in given realm and with an unknown (null) element
	 * type.
	 * 
	 * @param realm
	 *            the realm
	 * 
	 */
	public ComputedList(Realm realm) {
		this(realm, null);
	}
	/**
	 * Creates a computed list in the given realm and with the given element
	 * type.
	 * 
	 * @param realm
	 *            the realm