original_string: public static function isCardToken($param)
  	{
  		$isValid = false;
  
  		if(isset($param['cardToken'])){
  			$isTokenEmpty = CheckoutApi_Lib_Validator::isEmpty($param['cardToken']);
  
  			if(!$isTokenEmpty) {
  				$isValid = true;
  			}
  		}
  
  		return $isValid;
  	}
code: public static function isCardToken($param)
  	{
  		$isValid = false;
  
  		if(isset($param['cardToken'])){
  			$isTokenEmpty = CheckoutApi_Lib_Validator::isEmpty($param['cardToken']);
  
  			if(!$isTokenEmpty) {
  				$isValid = true;
  			}
  		}
  
  		return $isValid;
  	}
code_tokens: public static function isCardToken ( $ param ) { $ isValid = false ; if ( isset ( $ param [ 'cardToken' ] ) ) { $ isTokenEmpty = CheckoutApi_Lib_Validator :: isEmpty ( $ param [ 'cardToken' ] ) ; if ( ! $ isTokenEmpty ) { $ isValid = true ; } } return $ isValid ; }
docstring: A helper method that check that check if token is set in payload
  @param array $param
  @return boolean
  Simple usage:
  CheckoutApi_Client_Validation_GW3::isCardToken($param)
docstring_tokens: A helper method that check that check if token is set in payload