toJson method
Converts the PECard object to a JSON map.
This method is useful for serializing the object for API communication.
Example:
PECard card = PECard(env: "sandbox", token: "abc123", cardData: cardData);
Map<String, dynamic> jsonData = card.toJson();
Implementation
Map<String, dynamic> toJson() {
return {
if (env != null) 'env': env,
'token': token,
'card_data': cardData.toJson(),
};
}