code: protected function writeException($exception)
      {
          $this->writeNewLine();
  
          do {
              $exceptionStack[] = $exception;
          } while ($exception = $exception->getPreviousWrapped());
  
          // Parse nested exception trace line by line.
          foreach (explode("\n", $exception = array_shift($exceptionStack)) as $line) {
              // Print exception name and message.
              if ($exception && false !== $pos = strpos($line, $exception->getClassName() . ': ')) {
                  $whitespace = str_repeat(' ', ($pos += strlen($exception->getClassName())) + 2);
                  $this->writeWithColor('bg-red,fg-white', $whitespace);
  
                  // Exception name.
                  $this->writeWithColor('bg-red,fg-white', sprintf(' %s ', substr($line, 0, $pos)), false);
                  // Exception message.
                  $this->writeWithColor('fg-red', substr($line, $pos + 1));
  
                  $this->writeWithColor('bg-red,fg-white', $whitespace);
  
                  $exception = array_shift($exceptionStack);
  
                  continue;
              }
  
              $this->writeWithColor('fg-red', $line);
          }
      }
docs: Writes the specified exception's message to the output buffer.
  
  @param ExceptionWrapper $exception Exception.