checkNotNull(function);
    return Optional.absent();
  }

  @Override
  public boolean equals(@Nullable Object obj) {
    return this == obj;
  }

  @Override
  public int hashCode() {
    return 0x79a31aac;
  }

  @Override
  public String toString() {
    return "Optional.absent()";
  }

  private Object readResolve() {
    return INSTANCE;
  }

		if err != nil {
			r.err = err
			return err
		}
		if !utf8.Valid(b) {
			return errInvalidTextEncodingError()
		}
		reader := newReader(bytes.NewReader(b))
		record, err := reader.Read()
		if err != nil {
			r.err = err
			if err != io.EOF {
				r.err = errCSVParsingError(err)
				return errCSVParsingError(err)
			}
			return err
		}

		if r.args.FileHeaderInfo == use {

            log.debug("Mock unregistered witness: {}", registrationId);
            return true;
        }
        return false;
    }

    /**
     * Get the number of active registrations
     *
     * @return the registration count
     */
    public int getRegistrationCount() {
        return registrations.size();
    }

    /**
     * Check if a registration exists
     *

      }
      return ImmutableMap.copyOf(map);
    }

    @Override
    public Iterable<Entry<AnEnum, String>> order(List<Entry<AnEnum, String>> insertionOrder) {
      return new Ordering<Entry<AnEnum, String>>() {

        @Override
        public int compare(Entry<AnEnum, String> left, Entry<AnEnum, String> right) {
          return left.getKey().compareTo(right.getKey());
        }

   *
   * @param expect the expected value
   * @param update the new value
   * @return {@code true} if successful. False return indicates that the actual value was not
   *     bitwise equal to the expected value.
   */
  public final boolean compareAndSet(double expect, double update) {
    return value.compareAndSet(doubleToRawLongBits(expect), doubleToRawLongBits(update));
  }

  /**

    public String getName() {
        return this.filename;
    }

    @Override
    public int getType() {
        return SmbConstants.TYPE_FILESYSTEM;
    }

    /**
     * @return the fileIndex
     */
    @Override
    public int getFileIndex() {
        return this.fileIndex;
    }

    /**
     * Gets the filename.
     *
     * @return the filename
     */

        // When & Then
        assertTrue(negotiationRequest.isSigningEnforced(), "First call should return true");
        assertFalse(negotiationRequest.isSigningEnforced(), "Second call should return false");
        assertTrue(negotiationRequest.isSigningEnforced(), "Third call should return true");

        verify(negotiationRequest, times(3)).isSigningEnforced();
    }

    @Test

        return false;
    }

    private Source getSettingsSource(File settingsFile, Source settingsSource) {
        if (settingsSource != null) {
            return settingsSource;
        } else if (settingsFile != null && settingsFile.exists()) {
            return new FileSource(settingsFile);
        }
        return null;
    }

    private Settings readSettings(

        }

        public String getUsername() {
            return username;
        }

        public String getDomain() {
            return domain;
        }

        public AuthType getAuthType() {
            return authType;
        }

        public long getTimestamp() {
            return timestamp;
        }

        public String getClientAddress() {

            public boolean isLdapIgnoreNetbiosName() {
                return true;
            }

            @Override
            public boolean isLdapGroupNameWithUnderscores() {
                return false;
            }
        });
        LdapManager ldapManager = new LdapManager();
        ldapManager.init();

        // Edge cases that should return null
        assertNull(ldapManager.getSearchRoleName(null));