@Override
  Set<V> createUnmodifiableEmptyCollection() {
    return emptySet();
  }

  @Override
  <E extends @Nullable Object> Collection<E> unmodifiableCollectionSubclass(
      Collection<E> collection) {
    return unmodifiableSet((Set<E>) collection);
  }

  @Override
  Collection<V> wrapCollection(@ParametricNullness K key, Collection<V> collection) {
    return new WrappedSet(key, (Set<V>) collection);
  }

        /**
         * @return CharSequence
         */
        public static CharSequence aaa() {
            return createCharSequence("aaa");
        }

        /**
         * @return CharSequence
         */
        public static CharSequence bbb() {
            return createCharSequence("bbb");
        }

        /**
         * @return CharSequence
         */

    @Override
    public String asTableDbName() {
        return asEsIndexType();
    }

    @Override
    protected String asEsIndex() {
        return "fess_config.scheduled_job";
    }

    @Override
    public String asEsIndexType() {
        return "scheduled_job";
    }

    @Override
    public String asEsSearchType() {
        return "scheduled_job";
    }

    @Override

     *
     * @param artifact an artifact
     * @return found artifact
     * @since 3.0-alpha-3
     */
    Artifact find(Artifact artifact);

    /**
     * Finds the versions of the specified artifact that are available in this repository.
     *
     * @param artifact The artifact whose available versions should be determined, must not be {@code null}.

    return delegate!!.peerPrincipal
  }

  override fun getLocalPrincipal(): Principal {
    return delegate!!.localPrincipal
  }

  override fun getCipherSuite(): String {
    return delegate!!.cipherSuite
  }

  override fun getProtocol(): String {
    return delegate!!.protocol
  }

  override fun getPeerHost(): String {
    return delegate!!.peerHost
  }

		// Make sure to return object info to provide extra information.
		return objInfo, wquorum, toObjectErr(errMethodNotAllowed, bucket, object)
	}

	if fi.Deleted {
		if opts.VersionID == "" || opts.DeleteMarker {
			return objInfo, wquorum, toObjectErr(errFileNotFound, bucket, object)
		}
		// Make sure to return object info to provide extra information.

            return (T) convertDate(arg);
        } else if (Boolean.class.isAssignableFrom(propertyType)) {
            return (T) BooleanConversionUtil.toBoolean(arg);
        } else if (arg != null && arg.getClass() != String.class && String.class == propertyType) {
            return (T) arg.toString();
        } else if (arg instanceof String && !String.class.equals(propertyType)) {
            return (T) convertWithString(arg);

	if err != nil {
		return err
	}
	return conn.Ping()
}

type PreparedStmtTX struct {
	Tx
	PreparedStmtDB *PreparedStmtDB
}

func (db *PreparedStmtTX) GetDBConn() (*sql.DB, error) {
	return db.PreparedStmtDB.GetDBConn()
}

func (tx *PreparedStmtTX) Commit() error {
	if tx.Tx != nil && !reflect.ValueOf(tx.Tx).IsNil() {
		return tx.Tx.Commit()
	}
	return ErrInvalidTransaction
}

            return null;
        }

        if (conflictResolver == null) {
            return null;
        }

        if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathCompile)) {
            return conflictResolver.resolveConflicts(getGraph(), ArtifactScopeEnum.compile);
        } else if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathRuntime)) {

    }

    public String getLogMessage() {
        return getUrl();
    }

    public LocalDateTime getRequestedAt() {
        return getCreatedAt();
    }

    @Override
    public Map<String, Object> toSource() {
        final Map<String, Object> sourceMap = super.toSource();
        if (fields != null) {
            sourceMap.putAll(fields);
        }
        return sourceMap;
    }

    @Override