code: function DialogService(serviceRegistry, commandRegistry) {
  		this._serviceRegistry = serviceRegistry;
  		this._commandRegistry = commandRegistry;
  		this._serviceRegistration = serviceRegistry.registerService("orion.page.dialog", this); //$NON-NLS-0$
  	}
docs: Constructs a new dialog service. Clients should obtain a dialog service by
  requesting the service <tt>orion.page.dialog</tt> from the service registry. This
  constructor should only be used by configuration code that is initializing
  a service registry
  @class The dialog service provides common helper dialogs such as confirmation and
  information dialogs.
  @name orion.dialogs.DialogService