initCollectionWithNullElement();
    expectReturnsTrue(disjoint);
    expectContents();
  }

  // retainAll(null)

  /*
   * AbstractCollection fails the retainAll(null) test when the subject
   * collection is empty, but we'd still like to test retainAll(null) when we
   * can. We split the test into empty and non-empty cases. This allows us to
   * suppress only the former.
   */

     * it returns a subclass of Joiner that overrides this method to tolerate null inputs.
     *
     * Unfortunately, we don't distinguish between these two cases in our public API: Joiner.on(...)
     * and Joiner.on(...).useForNull(...) both declare the same return type: plain Joiner. To ensure
     * that users *can* pass null arguments to Joiner, we annotate it as if it always tolerates null
     * inputs, rather than as if it never tolerates them.
     *

 *       collection. This is a stronger guarantee than that of {@link
 *       Collections#unmodifiableCollection}, whose contents change whenever the wrapped collection
 *       is modified.
 *   <li><b>Null-hostility.</b> This collection will never contain a null element.
 *   <li><b>Deterministic iteration.</b> The iteration order is always well-defined, depending on
 *       how the collection was created. Typically this is insertion order unless an explicit

            long id = 0;
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (line.length() == 0 || line.charAt(0) == '#') {
                    if (updater != null) {
                        updater.write(line);
                    }
                    continue; // ignore empty lines and comments

  private val key: String

  /** Non-null for client web sockets. These can be canceled. */
  internal var call: Call? = null

  /** This task processes the outgoing queues. Call [runWriter] to after enqueueing. */
  private var writerTask: Task? = null

  /** Null until this web socket is connected. Only accessed by the reader thread. */
  private var reader: WebSocketReader? = null

import org.dbflute.util.DfTypeUtil;

/**
 * @author FreeGen
 */
public class RoleBhv extends BsRoleBhv {
    private String indexName = null;

    @Override
    protected String asEsIndex() {
        if (indexName == null) {
            final String name = ComponentUtil.getFessConfig().getIndexUserIndex();
            indexName = super.asEsIndex().replaceFirst(Pattern.quote("fess_user"), name);
        }

            return null;
        }

        @Override
        public Map<String, String[]> getFields() {
            return null;
        }

        @Override
        public Map<String, String[]> getConditions() {
            return null;
        }

        @Override
        public String[] getLanguages() {
            return null;
        }

        @Override

        if (requestBody != null && requestBody.isOneShot()) {
          return null
        }

        if (exchange == null || !exchange.isCoalescedConnection) {
          return null
        }

        exchange.connection.noCoalescedConnections()
        return userResponse.request
      }

      else -> {
        return null
      }
    }
  }

    cache?.trackResponse(strategy)

    if (cacheCandidate != null && cacheResponse == null) {
      // The cache candidate wasn't applicable. Close it.
      cacheCandidate.body.closeQuietly()
    }

    // If we're forbidden from using the network and the cache is insufficient, fail.
    if (networkRequest == null && cacheResponse == null) {
      return Response
        .Builder()
        .request(chain.request())

        }
    }

    @Test
    public void test_process_withNullParameters() throws IOException, ServletException {
        // Test null parameter handling
        TestWebApiManager manager = new TestWebApiManager("/api");

        try {
            manager.process(null, null, null);
            assertTrue(manager.isProcessCalled());
        } catch (NullPointerException e) {
            // Expected for some implementations