code: public String getComment(int type)
  	{
  		if (allow(type&ID3V1))
  		{
  			return id3v1.getComment();
  		}
  		if (allow(type&ID3V2))
  		{
  			return id3v2.getFrameDataString(ID3v2Frames.COMMENTS);
  		}
  		return null;
  	}
docs: Returns the comment field of this mp3 if set and the empty string if
  not.
  
  @return the comment field of this mp3
  @exception ID3v2FormatException if the data of the field is incorrect