docs: def fromDict(cls, d):
          """
          Create a new instance from attribute values provided in a dictionary.
  
          @param d: A C{dict} with keys/values for the attributes of a new
              instance of this class. Keys 'id' and 'sequence' with C{str} values
              must be provided. A 'quality' C{str} key is optional. Keys 'start'
              and 'stop' must have C{int} values. Keys 'openLeft' and 'openRight'
              are C{bool}, all keys are as described in the docstring for this
              class.
          @return: A new instance of this class, with values taken from C{d}.
          """
          # Make a dummy instance whose attributes we can set explicitly.
          new = cls(AARead('', ''), 0, 0, True, True)
          new.id = d['id']
          new.sequence = d['sequence']
          new.quality = d.get('quality')
          new.start = d['start']
          new.stop = d['stop']
          new.openLeft = d['openLeft']
          new.openRight = d['openRight']
          return new