/**
 * Saves a mediafile (encoded as base64) into this service.
 *
 * Technical:
 * POST to /internal/media/upload_mediafile/ with JSON payload.
 * Returns 200 on success, 4xx on errors with a message in the payload.
 */
upload_mediafile(file: string, id: Id, mimetype: string): {message: string} | void

/**
 * Saves a resource (encoded as base64) into this service.
 *
 * Technical:
 * POST to /internal/media/upload_resource/ with JSON payload.
 * Returns 200 on success, 4xx on errors with a message in the payload.
 */
upload_resource(file: string, id: Id, mimetype: string): {message: string} | void

/**
 * Retrieves a mediafile given by it's id.
 *
 * Technical:
 * GET to /system/media/get/<mediafile_id>
 * Returns 200 on success and 404, if the resource does not exist
 */
get(mediafile_id: Id): Blob

/**
 * Retrieves a resource given by it's id.
 *
 * Technical:
 * GET to /system/media/get_resource/<resource_id>
 * Returns 200 on success and 404, if the resource does not exist
 */
get(resource_id: Id): Blob