Bug 207844 [DataBinding] Support SWTObservables.observeText for Shells.
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/swt/SWTObservables.java
private Display display;
		/**
		 * @param display
		 */
		private DisplayRealm(Display display) {
			this.display = display;
		}
		public boolean isCurrent() {
			return Display.getCurrent() == display;
		}
		public void asyncExec(final Runnable runnable) {
			Runnable safeRunnable = new Runnable() {
				public void run() {
					safeRun(runnable);
				}
			};
			if (!display.isDisposed()) {
				display.asyncExec(safeRunnable);
			}
		}
		/*