register method
Implementation
void register({required String miniProgramId, required String mediaRef}) {
_ensureActive();
final normalized = _validReference(mediaRef);
final owner = _owners[normalized];
if (owner != null) {
throw const MiniProgramMediaException(
errorCode: MiniProgramErrorCodes.mediaInvalidResult,
message: 'The host returned a duplicate media reference.',
);
}
_owners[normalized] = miniProgramId;
}