return null;
            }

            return expression.substring(start, idx);
        }

        public int getPosition() {
            return idx < expression.length() ? idx : EOF;
        }

        // to make tokenizer look pretty in debugger
        @Override
        public String toString() {

            this.session = session;
            return this;
        }

        public ProjectBuilderRequestBuilder path(Path path) {
            this.path = path;
            return this;
        }

        public ProjectBuilderRequestBuilder source(Source source) {
            this.source = source;
            return this;
        }

	cause      error
}

func (err *s3Error) Cause() error {
	return err.cause
}

func (err *s3Error) ErrorCode() string {
	return err.code
}

func (err *s3Error) ErrorMessage() string {
	return err.message
}

func (err *s3Error) HTTPStatusCode() int {
	return err.statusCode
}

func (err *s3Error) Error() string {
	return err.message
}

func errMalformedXML(err error) *s3Error {

        String value = joiner.toString();
        if (value.isEmpty()) {
            return new String[0];
        }
        return new String[] {option, value};
    }

    /**
     * {@return a string representation of this path type for debugging purposes}.
     */
    @Override
    public String toString() {
        return "PathType[" + id() + "]";
    }

    /**

    public Object get(final String key) {
        return params.get(key);
    }

    public String getAsString(final String key) {
        if (params.get(key) instanceof final String strValue) {
            return strValue;
        }
        final Object value = params.get(key);
        if (value != null) {
            return value.toString();
        }
        return null;
    }

  @Override
  public int count(@CheckForNull Object element) {
    return forward.count(element);
  }

  @Override
  @CheckForNull
  public Entry<E> firstEntry() {
    return forward.lastEntry();
  }

  @Override
  @CheckForNull
  public Entry<E> lastEntry() {
    return forward.firstEntry();
  }

  @Override
  public int size() {
    return forward.size();
  }

  @Override

     * @param selectedMech
     * @return whether the specified mechanism is preferred
     */
    boolean isPreferredMech ( ASN1ObjectIdentifier selectedMech );


    /**
     * @return context flags
     */
    int getFlags ();


    /**
     * @return array of supported mechanism OIDs
     */
    ASN1ObjectIdentifier[] getSupportedMechs ();


    /**
     * 

            key,
            (k, oldValue) -> {
              if (oldValue == null || oldValue == 0) {
                noValue.set(true);
                return newValue;
              } else {
                return oldValue;
              }
            });
    return noValue.get() ? 0L : requireNonNull(result).longValue();
  }

  /**

        public int hashCode() {
            return hashCode;
        }

        @Override
        public boolean equals(Object obj) {
            if (this == obj) {
                return true;
            }
            if (!(obj instanceof GAKey)) {
                return false;
            }

            GAKey other = (GAKey) obj;

				freeEntry.DeleteMarker.MetaSys[k] = v
			}
		}
		return freeEntry, true
	}
	return xlMetaV2Version{}, false
}

// FreeVersion returns true if j represents a free-version, false otherwise.
func (j xlMetaV2DeleteMarker) FreeVersion() bool {
	_, ok := j.MetaSys[ReservedMetadataPrefixLower+freeVersion]
	return ok
}

// FreeVersion returns true if j represents a free-version, false otherwise.