* Logs a message at the specified level with an associated exception.
     *
     * @param level the severity level of the message
     * @param message the message to be logged
     * @param error the associated exception, or null if not applicable
     */
    void log(@Nonnull Level level, @Nonnull String message, @Nullable Throwable error);

    /**
     * Logs a debug message without an associated exception.
     *

   *   absent.
   */

  /**
   * If {@code key} is not already associated with a value or if {@code key} is associated with
   * zero, associate it with {@code newValue}. Returns the previous value associated with {@code
   * key}, or zero if there was no mapping for {@code key}.
   */
  long putIfAbsent(K key, long newValue) {
    while (true) {

 * @author Charles Fry
 * @since 11.0
 */
@GwtCompatible
public interface LoadingCache<K, V> extends Cache<K, V>, Function<K, V> {

  /**
   * Returns the value associated with {@code key} in this cache, first loading that value if
   * necessary. No observable state associated with this cache is modified until loading completes.
   *
   * <p>If another call to {@link #get} or {@link #getUnchecked} is currently loading the value for

     *
     * @param id the Security Identifier
     * @param attributes the attribute flags associated with the SID
     */
    public PacSidAttributes(final SID id, final int attributes) {
        this.id = id;
        this.attributes = attributes;
    }

    /**
     * Gets the Security Identifier.
     *
     * @return the SID associated with this instance
     */
    public SID getId() {
        return this.id;
    }

 * @author Charles Fry
 * @since 11.0
 */
@GwtCompatible
public interface LoadingCache<K, V> extends Cache<K, V>, Function<K, V> {

  /**
   * Returns the value associated with {@code key} in this cache, first loading that value if
   * necessary. No observable state associated with this cache is modified until loading completes.
   *
   * <p>If another call to {@link #get} or {@link #getUnchecked} is currently loading the value for

     *
     * @param id the identifier for the path scope
     * @param projectScope the project scope associated with this path scope
     * @param dependencyScopes the dependency scopes associated with this path scope
     * @return a new PathScope instance
     */
    static PathScope pathScope(String id, ProjectScope projectScope, DependencyScope... dependencyScopes) {

        this.reconnecting = reconnecting;
    }

    /**
     * Get the associated file object
     * @return the file object (can be null)
     */
    public Object getFile() {
        return file;
    }

    /**
     * Set the associated file object
     * @param file the file object
     */
    public void setFile(Object file) {
        this.file = file;

   * <p>If {@code nodeU} and {@code nodeV} are not already present in this graph, this method will
   * silently {@link #addNode(Object) add} {@code nodeU} and {@code nodeV} to the graph.
   *
   * @return the value previously associated with the edge connecting {@code nodeU} to {@code
   *     nodeV}, or null if there was no such edge.
   * @throws IllegalArgumentException if the introduction of the edge would violate {@link
   *     #allowsSelfLoops()}
   */

@GwtCompatible
public interface Cache<K, V> {

  /**
   * Returns the value associated with {@code key} in this cache, or {@code null} if there is no
   * cached value for {@code key}.
   *
   * @since 11.0
   */
  @CanIgnoreReturnValue // TODO(b/27479612): consider removing this?
  @Nullable V getIfPresent(@CompatibleWith("K") Object key);

  /**
   * Returns the value associated with {@code key} in this cache, obtaining that value from {@code

   * discarded and not returned.
   *
   * @param key the key with which the specified value is to be associated
   * @param value the value to be associated with the specified key
   * @return the value that was previously associated with the key, or {@code null} if there was no
   *     previous entry. (If the bimap contains null values, then {@code forcePut}, like {@code