code: public function handle($level, $message, $file = null, $line = null, array $context = [])
      {
          throw new \InvalidArgumentException(
                  $message . ' @ ' . $file . ' on line ' . $line
          );
      }
docs: handles the given error
  
  @param   int     $level    level of the raised error
  @param   string  $message  error message
  @param   string  $file     filename that the error was raised in
  @param   int     $line     line number the error was raised at
  @param   array   $context  array of every variable that existed in the scope the error was triggered in
  @return  bool    true if error message should populate $php_errormsg, else false
  @throws  \InvalidArgumentException