export interface CustomValidator<InputType = any, TargetType = InputType> {
    error: string;
    /**
     * Parse the input value after validation.
     */
    parse?(value: InputType): TargetType;
    /**
     * Parse the input value before validation.
     */
    preParse?(value: InputType): TargetType;
    /**
     * Validate the input value.
     */
    validate(value: InputType | TargetType): value is TargetType;
}