* Updates stock quantity and availability status * * @param quantity - New stock quantity * @returns The updated product instance * * @

* Validates the current field value * * @returns Validation result * * @example * ```typescript * const result = field.validate()

* Validates the current field value * * @returns Validation result * * @example * ```typescript * const result = field.validate()

* Waits for an event to be emitted * * @typeParam K - Event name type * @param event - Event to wait for * @param timeout - Optional timeo