ExtensionCall.fromJson constructor
Implementation
factory ExtensionCall.fromJson(Map<String, Object?> json) {
if (json case {
'__extn': {'fn': final String fn, 'arg': final Object? arg},
}) {
return ExtensionCall(fn: fn, arg: Value.fromJson(arg));
}
throw FormatException('Invalid Cedar extension call: $json');
}