Bug 320171 [Model] Use real Java-References in the Binding-Model-Elements
Currently they BindingTable is referencing a BindingContext using an ID. To me it looks like BindingTable is a child of BindingContext and then doesn't need the ID-Reference any more
bundles/org.eclipse.e4.ui.model.workbench/src/org/eclipse/e4/ui/model/application/descriptor/basic/impl/PartDescriptorImpl.java
*/
	protected boolean dirtyable = DIRTYABLE_EDEFAULT;
	/**
	 * The default value of the '{@link #getContributionURI() <em>Contribution URI</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getContributionURI()
	 * @generated
	 * @ordered
	 */
	protected static final String CONTRIBUTION_URI_EDEFAULT = null;
	/**
	 * The cached value of the '{@link #getContributionURI() <em>Contribution URI</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getContributionURI()
	 * @generated
	 * @ordered
	 */
	protected String contributionURI = CONTRIBUTION_URI_EDEFAULT;
	/**
	 * The default value of the '{@link #getDescription() <em>Description</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getDescription()
	 * @generated
	 * @ordered
	 */
	protected static final String DESCRIPTION_EDEFAULT = null;
	/**