anchor.diff:                  raise Exception()
   }  -> channel(HIDDEN)
       ;
  -
       
   COMMENT:        '#' ~[\r\n]* -> skip;
   
  
positive.code:     # Indented to append code to the constructor.
      self._openBRCount       = 0
      self._suppressNewlines  = False
      self._lineContinuation              = False
      self._tokens            = self.TokenQueue()
      self._indents           = self.IndentStack()
  
  
negative.code: CLOSE_BRACE:    '}' {self._openBRCount  -= 1};
  OPEN_BRACKET:   '[' {self._openBRCount  += 1};
  CLOSE_BRACKET:  ']' {self._openBRCount  -= 1};
  
  UNKNOWN: . -> skip;
  
  