Function setIfMissing

setIfMissing<const T>(value: T): SetIfMissingOp<T>
Creates a setIfMissing operation with the provided value.
Type Parameters
- const T
Parameters
- value: T
  The value to set if missing.
Returns SetIfMissingOp<T>
A setIfMissing operation. https://www.sanity.io/docs/http-patches#A80781bT
Example
```
const setFooIfMissing = setIfMissing('foo')
const setEmptyArrayIfMissing = setIfMissing([])
```
- Defined in migrate/src/mutations/operations/creators.ts:44