static final class Helper<K, V>
        implements InternalEntryHelper<
            K, V, StrongKeyStrongValueEntry<K, V>, StrongKeyStrongValueSegment<K, V>> {
      private static final Helper<?, ?> INSTANCE = new Helper<>();

      @SuppressWarnings("unchecked")
      static <K, V> Helper<K, V> instance() {
        return (Helper<K, V>) INSTANCE;
      }

      @Override

    private static boolean isTestPathElement(final String scope) {
        return true;
    }

    /**
     * Returns a filtered list of classpath elements. This method is invoked when the caller
     * requested that all dependencies are placed on the classpath, with no module-path element.
     *
     * @param scopeFilter a filter returning {@code true} for the artifact scopes to accept.

import org.codelibs.fess.es.user.exentity.User;
import org.codelibs.fess.exception.LdapConfigurationException;
import org.codelibs.fess.exception.LdapOperationException;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.OptionalUtil;
import org.dbflute.optional.OptionalEntity;

   * PeekingIterator#remove()}.
   *
   * <p>Note: If the given iterator is already a {@code PeekingIterator}, it <i>might</i> be
   * returned to the caller, although this is neither guaranteed to occur nor required to be
   * consistent. For example, this method <i>might</i> choose to pass through recognized

        @Override
        public String toString() {
          return description;
        }
      };
    }
  }

  /**
   * Helper method for {@link #precomputedInternal} that doesn't test if the negation is cheaper.
   */
  @GwtIncompatible // SmallCharMatcher
  private static CharMatcher precomputedPositive(

 *
 * <p>If the precondition is not met, the {@code Preconditions} method throws an unchecked exception
 * of a specified type, which helps the method in which the exception was thrown communicate that
 * its caller has made a mistake. This allows constructs such as
 *
 * <pre>{@code
 * public static double sqrt(double value) {
 *   if (value < 0) {
 *     throw new IllegalArgumentException("input is negative: " + value);
 *   }

import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.misc.Pair;
import org.codelibs.core.misc.Tuple3;
import org.codelibs.core.misc.Tuple4;
import org.codelibs.fess.Constants;
import org.codelibs.fess.helper.PermissionHelper;
import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.taglib.FessFunctions;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.JvmUtil;

    try {
      cache.getUnchecked("bar");
      fail();
    } catch (UncheckedExecutionException expected) {
    }
    assertEquals(2, callCount.get());
  }

  /**
   * Test-helper method that performs {@code nThreads} concurrent calls to {@code cache.get(key)} or
   * {@code cache.getUnchecked(key)}, and returns a List containing each of the results. The result

  private static final long SPIN_THRESHOLD_NANOS = 1000L;

  private static final AtomicHelper ATOMIC_HELPER;

  static {
    AtomicHelper helper;
    Throwable thrownUnsafeFailure = null;
    Throwable thrownAtomicReferenceFieldUpdaterFailure = null;

    try {
      helper = new UnsafeAtomicHelper();
    } catch (Exception | Error unsafeFailure) { // sneaky checked exception

import org.codelibs.fess.exception.ResultOffsetExceededException;
import org.codelibs.fess.exception.SearchQueryException;
import org.codelibs.fess.helper.DocumentHelper;
import org.codelibs.fess.helper.QueryHelper;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.query.QueryFieldConfig;
import org.codelibs.fess.util.BooleanFunction;