.and(CharMatcher.isNot(' '))
          .and(CharMatcher.noneOf("()<>@,;:\\\"/[]?="));

  private static final CharMatcher QUOTED_TEXT_MATCHER = ascii().and(CharMatcher.noneOf("\"\\\r"));

  /*
   * This matches the same characters as linear-white-space from RFC 822, but we make no effort to
   * enforce any particular rules with regards to line folding as stated in the class docs.
   */

 *   <!-- TODO(kevinb): how can we make this not produce a warning when building gwt javadoc? -->
 *   <li>{@link StandardCharsets#US_ASCII} specifies the {@code Charset} of ASCII characters.
 *   <li>{@link CharMatcher#ascii} matches ASCII characters and provides text processing methods
 *       which operate only on the ASCII characters of a string.
 * </ul>
 *
 * @author Catherine Berry
 * @author Gregory Kick
 * @since 7.0
 */

    assertNotNull(region2);
    
    manager.cleanup();
}
```

### 7.2 Integration Tests
```java
@Test
@EnabledIfSystemProperty(named = "rdma.test.enabled", matches = "true")
public void testRdmaLargeFileTransfer() throws Exception {
    CIFSContext context = getTestContext();
    context.getConfig().setProperty("jcifs.smb.client.useRDMA", "true");
    

	if ldap {
		// Validate and normalize users, then fetch and normalize their groups
		// Also include unvalidated users for backward compatibility.
		for _, user := range q.Users {
			lookupRes, actualGroups, _ := sys.LDAPConfig.GetValidatedDNWithGroups(user)
			if lookupRes != nil {
				groupSet := set.CreateStringSet(actualGroups...)

				// duplicates can be overwritten, fetched groups should be identical.

        }

        for (final Node childNode : childNodeList) {
            pruneNodeByTags(childNode, prunedTags);
        }

        return node;
    }

    /**
     * Checks if a node matches any of the pruned tag configurations.
     *
     * @param node the node to check
     * @param prunedTags the array of pruned tag configurations
     * @return true if the node should be pruned, false otherwise
     */

    //                                                                        Small Helper
    //                                                                        ============
    /**
     * Verifies that the CRUD mode matches the expected mode.
     *
     * @param crudMode the current CRUD mode
     * @param expectedMode the expected CRUD mode
     * @param dictId the dictionary ID for error handling
     */

    stoppingThread.join(1000);
    assertFalse("stopAsync has deadlocked!.", stoppingThread.isAlive());
    failLeave.countDown(); // release the background thread
  }

  /**
   * Catches a bug where when constructing a service manager failed, later interactions with the
   * service could cause IllegalStateExceptions inside the partially constructed ServiceManager.

     *   where multiple modules in the reactor have the same artifactId.
     * <p>
     * {@code -rf :artifactId} will pick up the first module which matches, but when multiple modules in the reactor
     *   have the same artifactId, effective failed module might be later in build reactor.

  public enum TransitiveClosureSelfLoopStrategy {
    /**
     * Add a self-loop to each node in the original graph; this is based on a definition of "cycle
     * incident to a node" that includes zero-length cycles. This matches the behavior of the
     * now-deprecated {@link #transitiveClosure(Graph)} method.
     */
    ADD_SELF_LOOPS_ALWAYS,
    /**

   * method. However, there are some subtle considerations:
   *
   * <ul>
   *   <li>The {@link Predicate} returned by this method is {@link Serializable}.
   *   <li>The {@link Predicate} returned by this method catches {@link ClassCastException} and
   *       {@link NullPointerException}.
   *   <li>Code that chains multiple predicates together (especially negations) may be more readable