/**
  * Constructor
  *
  * @param  string  $methodName  The method name that raised the exception
  * @param  string  $argName     The argument name that is not implemented
  */
 public function __construct($methodName, $argName)
 {
     $message = sprintf('The %s() method\'s argument $%s behavior is not implemented.', $methodName, $argName);
     parent::__construct($message);
 }
 /**
  * Constructor
  *
  * @param string $methodName        The method name that raised the exception
  * @param string $argName           The argument name
  * @param string $argValue          The argument value that is not implemented
  * @param string $additionalMessage An optional additional message to append to the exception message
  */
 public function __construct($methodName, $argName, $argValue, $additionalMessage = '')
 {
     $message = sprintf('The %s() method\'s argument $%s value %s behavior is not implemented.%s', $methodName, $argName, var_export($argValue, true), $additionalMessage !== '' ? ' ' . $additionalMessage . '. ' : '');
     parent::__construct($message);
 }