Bug 166706 [Databinding] WritableList.clear() does not clear the list
3.3 M3 The wrappedList is not modified that I can see when org.eclipse.jface.databinding.observable.list.WritableList.clear() is called.
bundles/org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/list/WritableList.java
*/
	public WritableList() {
		this(Realm.getDefault(), Object.class);
	}
	/**
	 * Creates an empty writable list containing elements of type Object.
	 * @param realm 
	 */
	public WritableList(Realm realm) {
		this(realm, Object.class);
	}
	
	/**
	 * Creates an empty writable list in the default realm, containing elements of the given type.
	 * @param realm 
	 * 
	 * @param elementType
	 */
	public WritableList(Object elementType) {
		this(Realm.getDefault(), new ArrayList(), elementType);
	}
	/**
	 * Creates an empty writable list containing elements of the given type.
	 * @param realm 
	 * 
	 * @param elementType
	 */
	public WritableList(Realm realm, Object elementType) {
		super(realm, new ArrayList(), elementType);
	}