Bug 277966 [Databinding] regression: ObservablesManager throws NPE on dispose if one of the observables is already disposed
bundles/org.eclipse.core.databinding/src/org/eclipse/core/databinding/ObservablesManager.java
* All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Bob Smith - bug 198880, 249526
 *     Matthew Hall - bug 249526, 261513
 *******************************************************************************/
package org.eclipse.core.databinding;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.eclipse.core.databinding.observable.IObservable;
import org.eclipse.core.databinding.observable.ObservableTracker;
import org.eclipse.core.internal.databinding.Pair;
/**
 * An observables manager can be used for lifecycle management of
 * {@link IObservable} objects.
 *
 * @noextend This class is not intended to be subclassed by clients.
 *
 * @since 1.0
 *
 */
public class ObservablesManager {
	private Set managedObservables = new HashSet();