Here you can find the source of remove()
public static void remove()
//package com.java2s; /*/*from w w w . j a v a 2 s . c o m*/ * Sonatype Nexus (TM) Open Source Version * Copyright (c) 2008-present Sonatype, Inc. * All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions. * * This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0, * which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html. * * Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks * of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the * Eclipse Foundation. All other trademarks are the property of their respective owners. */ import java.util.concurrent.atomic.AtomicBoolean; public class Main { private static final ThreadLocal<AtomicBoolean> currentFlagHolder = new ThreadLocal<>(); public static void remove() { currentFlagHolder.remove(); } }