# RefBigInt.isLessThan

Check if the current state of a RefBigInt is less than a BigInt.

## Signatures

```ts
export declare const isLessThan: {
    (that: bigint): <E, R>(ref: RefBigInt<E, R>) => RefSubject.Computed<boolean, E, R>;
    <E, R>(ref: RefBigInt<E, R>, that: bigint): RefSubject.Computed<boolean, E, R>;
};
```

## Why

Check if the current state of a RefBigInt is less than a BigInt. The operation remains attached
to the RefSubject's versioned state boundary.

## Ownership and lifetime

The is less than view retains no independent state. An Effect read samples the source once; Fx
observation follows later pushes and its observing Scope owns subscription cleanup.