anchor.diff:    final String name;
   
     /** The full name of this logger, which includes the parent's full name. */
  -  String get fullName() =>
  +  String get fullName =>
         (parent == null || parent.name == '') ? name : '${parent.fullName}.$name';
   
     /** Parent of this logger in the hierarchy of loggers. */
  
positive.code:    * instance:
     *    logger.on.record.add((record) { ... });
     */
    LoggerEvents get on() => new LoggerEvents(this);
  
    /** Adds a handler to listen whenever a log record is added to this logger. */
    void _addHandler(LoggerHandler handler) {
  
negative.code:    * Effective level considering the levels established in this logger's parents
     * (when [hierarchicalLoggingEnabled] is true).
     */
    Level get level {
      if (hierarchicalLoggingEnabled) {
        if (_level != null) return _level;
        if (parent != null) return parent.level;
  