/**
 * Asserts that the unknownBlob is a string map. Used to validate JSON objects received over the wire.
 *
 * @param unknownBlob - The unknown object to validate.
 * @throws BugError - Thrown if the unknownBlob is not a string map.
 */
export declare function assertStringMap(unknownBlob: unknown): asserts unknownBlob is Record<string, string>;