if ( auth != null ) {
            return;
        }
        auth = a;
    }


    /**
     * 
     * @return the default authentiucation credentials
     */
    public static NtlmAuthenticator getDefault () {
        return auth;
    }


    protected final String getRequestingURL () {
        return this.url;
    }

 * <i>return</i> iterables should make every attempt to return ones of the robust variety.
 *
 * <p>This testing utility is not thread-safe.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
public final class MinimalIterable<E extends @Nullable Object> implements Iterable<E> {
  /** Returns an iterable whose iterator returns the given elements in order. */

    String SOURCE_CLI = "CLI";

    /**
     * Returns a simple designator of the options source, such as "cli", "maven.conf", etc.
     *
     * @return a string representing the source of the options
     */
    @Nonnull
    String source();

    /**
     * Returns the user-defined properties for the Maven execution.
     *
     * @return an {@link Optional} containing the map of user properties, or empty if not set

        E e = (E) element;
        return predicate.apply(e);
      }
      return false;
    }

    @Override
    public boolean containsAll(Collection<?> collection) {
      return containsAllImpl(this, collection);
    }

    @Override
    public boolean isEmpty() {
      return !Iterables.any(unfiltered, predicate);
    }

    @Override
    public Iterator<E> iterator() {

  @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);
  }

  @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);
  }

  /** Returns the empty array. */
  public static ImmutableDoubleArray of() {
    return EMPTY;
  }

  /** Returns an immutable array containing a single value. */
  public static ImmutableDoubleArray of(double e0) {
    return new ImmutableDoubleArray(new double[] {e0});
  }

  /** Returns an immutable array containing the given values, in order. */

		s += "\nreader error: " + e.readerErr.Error()
	}
	return s
}

// quoteChar formats c as a quoted character literal
func quoteChar(c byte) string {
	// special cases - different from quoted strings
	if c == '\'' {
		return `'\''`
	}
	if c == '"' {
		return `'"'`
	}

	// use quoted string with different quotation marks
	s := strconv.Quote(string(c))
	return "'" + s[1:len(s)-1] + "'"

	if objAPI == nil {
		return np, grid.NewRemoteErr(errServerNotInitialized)
	}

	policyName := mss.Get(peerRESTPolicy)
	if policyName == "" {
		return np, grid.NewRemoteErr(errors.New("policyName is missing"))
	}

	if err := globalIAMSys.DeletePolicy(context.Background(), policyName, false); err != nil {
		return np, grid.NewRemoteErr(err)
	}

	return
}

     */
    @Nonnull
    Version getBaseVersion();

    /**
     * Returns the classifier of the artifact.
     *
     * @return the classifier or an empty string if none, never {@code null}
     * @see ArtifactCoordinates#getClassifier()
     */
    @Nonnull
    String getClassifier();

    /**
     * Returns the file extension of the artifact.