in fbpcf/io/GCSFileManager.h [85:97]
void GCSFileManager<ClientCls>::write(
const std::string& fileName,
const std::string& data) {
const auto& ref = fbpcf::gcp::uriToObjectReference(fileName);
auto writer = GCSClient_->WriteObject(ref.bucket, ref.key);
writer << data;
writer.Close();
if (!writer.metadata()) {
throw GcpException{writer.metadata().status().message()};
}
}