question: protected int decodeLinePrefix ( PushbackInputStream aStream , OutputStream bStream ) throws IOException { return ( bytesPerLine ( ) ) ; }
target:  103 * This method should return, if it knows, the number of bytes 104  that will be decoded. Many formats such as uuencoding provide 105 * this information. By default we return the maximum bytes that 106 * could have been encoded on the line. 107