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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * by Oracle in the LICENSE file that accompanied this code.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package javafx.beans;

/**
 * {@code WeakListener} is the super interface of all weak listener implementations
 * in the JavaFX API. Usually it should not be used directly, but instead one of the
 * sub-interfaces will be used.
 *
 * @see WeakInvalidationListener
 * @see javafx.beans.value.WeakChangeListener
 *
 *
 * @since JavaFX 2.1
 */
public interface WeakListener {
    /**
     * Returns {@code true} if the linked listener was garbage-collected.
     * In this case, the listener can be removed from the observable.
     *
     * @return {@code true} if the linked listener was garbage-collected.
     */
    boolean wasGarbageCollected();
}