return ls;
    }

    // ===================================================================================
    //                                                                         Unique Info
    //                                                                         ===========
    @Override
    public boolean hasPrimaryKey() {
        return false;
    }

    @Override

                assertTrue("Field value should end with }: " + field.getName() + " = " + value, value.endsWith("}"));
            }
        }
    }

    /**
     * Test that all label constants have unique values
     */
    public void test_labelConstantsUniqueness() throws Exception {
        Field[] fields = FessLabels.class.getDeclaredFields();
        Set<String> values = new HashSet<>();

 * @param <N> Node parameter type
 * @since 20.0
 */
@Beta
public interface MutableGraph<N> extends Graph<N> {

  /**
   * Adds {@code node} if it is not already present.
   *
   * <p><b>Nodes must be unique</b>, just as {@code Map} keys must be. They must also be non-null.
   *
   * @return {@code true} if the graph was modified as a result of this call
   */
  @CanIgnoreReturnValue
  boolean addNode(N node);

  /**

        return crawlingInfoList;
    }

    /**
     * Retrieves a single crawling information record by its unique identifier.
     *
     * @param id the unique identifier of the crawling information record
     * @return an OptionalEntity containing the CrawlingInfo if found, empty otherwise
     */

        }
    }

    // ===================================================================================
    //                                                                          Unique Key
    //                                                                          ==========
    @Override
    public boolean hasPrimaryKeyValue() {
        return asDocMeta().id() != null;
    }

        return ls;
    }

    // ===================================================================================
    //                                                                         Unique Info
    //                                                                         ===========
    @Override
    public boolean hasPrimaryKey() {
        return false;
    }

    @Override

        }
    }

    // ===================================================================================
    //                                                                          Unique Key
    //                                                                          ==========
    @Override
    public boolean hasPrimaryKeyValue() {
        return asDocMeta().id() != null;
    }

/**
 * An interface for <a
 * href="https://en.wikipedia.org/wiki/Graph_(discrete_mathematics)">graph</a>-structured data,
 * whose edges are <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#uniqueness">unique</a> objects.
 *
 * <p>A graph is composed of a set of nodes and a set of edges connecting pairs of nodes.
 *
 * <p>There are three primary interfaces provided to represent graphs. In order of increasing

        return ls;
    }

    // ===================================================================================
    //                                                                         Unique Info
    //                                                                         ===========
    @Override
    public boolean hasPrimaryKey() {
        return false;
    }

    @Override

        }
    }

    // ===================================================================================
    //                                                                          Unique Key
    //                                                                          ==========
    @Override
    public boolean hasPrimaryKeyValue() {
        return asDocMeta().id() != null;
    }