Companion object in UploadService

UploadServiceCompanion.kt

   companion object {
        /**
         * Unique job ID for this service.
         */
        const val JOB_ID = 1000
        const val IMAGE_URI = "image_uri"
        const val IMAGE_URL = "image_url"
        const val DOCUMENT_URI = "document_uri"
        const val DOCUMENT_URL = "document_url"

        /**
         * Convenience method for enqueuing work in to this service.
         */
        fun enqueueWork(context: Context, work: Intent?) {
            enqueueWork(context,
                UploadService::class.java, JOB_ID,
                work!!)
        }
    }