"GCS project ID is blank. Please set the GCS_PROJECT_ID environment variable or projectId parameter.");
        }

        final StorageOptions.Builder builder = StorageOptions.newBuilder().setProjectId(projectId);

        final String endpoint = getInitParameter("endpoint", null, String.class);
        if (StringUtil.isNotBlank(endpoint)) {
            // For fake-gcs-server or custom endpoint

        this.bucket = bucket;

        final StorageOptions.Builder builder = StorageOptions.newBuilder();

        if (StringUtil.isNotBlank(projectId)) {
            builder.setProjectId(projectId);
        }

        if (StringUtil.isNotBlank(endpoint)) {
            // For fake-gcs-server or custom endpoint
            builder.setHost(endpoint);