toMap method
Implementation
SplayTreeMap toMap() {
String sig = '';
if (signature != null) {
sig = signature!;
}
final SplayTreeMap<String, Object> map = SplayTreeMap<String, Object>();
map['domain'] = domain;
map['payload'] = payload;
map['purpose'] = purpose;
map['signer'] = signer;
map['timestamp'] = timestamp;
map['signature'] = sig;
return map;
}