/**
 * Represents a read-only validatable object.
 * @template TValidationError The concrete type for representing validation errors (strings, enums, numbers etc.).
 */
export interface IReadOnlyValidatable<TValidationError = string> {
    /**
     * A flag indicating whether the object is valid.
     */
    readonly isValid: boolean;
    /**
     * A flag indicating whether the object is invalid.
     */
    readonly isInvalid: boolean;
    /**
     * Gets the error message when the object is invalid.
     */
    readonly error: TValidationError | null;
}