Bug 54470 Eclipse should disallow usage of types defined in default package
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/wizards/NewTypeWizardPage.java
/**
	 * Returns the chosen super interfaces.
	 * 
	 * @return a list of chosen super interfaces. The list's elements
	 * are of type <code>String</code>
	 */
	public List getSuperInterfaces() {
		return fSuperInterfacesDialogField.getElements();
	}
	/**
	 * Sets the super interfaces.
	 * 
	 * @param interfacesNames a list of super interface. The method requires that
	 * the list's elements are of type <code>String</code>
	 * @param canBeModified if <code>true</code> the super interface field is
	 * editable; otherwise it is read-only.
	 */	
	public void setSuperInterfaces(List interfacesNames, boolean canBeModified) {
		fSuperInterfacesDialogField.setElements(interfacesNames);
		fSuperInterfacesDialogField.setEnabled(canBeModified);
	}
			
	/**
	 * Returns the resource handle that corresponds to the compilation unit to was or
	 * will be created or modified.
	 * @return A resource or null if the page contains illegal values.
	 * @since 3.0
	 */
	public IResource getModifiedResource() {