original_string: public function isNegative( $binaryString ){
          $firstBit = $binaryString[0];
          $negativeFlag = $firstBit & "\x80";
          $isNegative = ord($negativeFlag) == 128;
          return $isNegative;
      }
code: public function isNegative( $binaryString ){
          $firstBit = $binaryString[0];
          $negativeFlag = $firstBit & "\x80";
          $isNegative = ord($negativeFlag) == 128;
          return $isNegative;
      }
code_tokens: public function isNegative ( $ binaryString ) { $ firstBit = $ binaryString [ 0 ] ; $ negativeFlag = $ firstBit & "\x80" ; $ isNegative = ord ( $ negativeFlag ) == 128 ; return $ isNegative ; }
docstring: Public for testing purposes
  @param type $binaryString
  @return type
docstring_tokens: Public for testing purposes