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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _GetFlagValues(self, flags):
 """Determines which events are indicated by a set of fsevents flags. Args: flags (int):
 fsevents record flags. Returns: str: a comma separated string containing descriptions of the flag values stored in an fsevents record. """

    event_types = []
    for event_flag, description in self._FLAG_VALUES.items():
      if event_flag & flags:
        event_types.append(description)
    return ', '.join(event_types)