Interface BooleanRule

interface BooleanRule {
    custom: <LenientFieldValue extends boolean>(
        fn: CustomValidator<LenientFieldValue>,
    ) => BooleanRule;
    error: (message?: string | LocalizedValidationMessages) => BooleanRule;
    info: (message?: string | LocalizedValidationMessages) => BooleanRule;
    required: () => BooleanRule;
    valueOfField: (path: string | string[]) => FieldReference;
    warning: (message?: string | LocalizedValidationMessages) => BooleanRule;
}