Any interest to `boost::find_gap` function?

```
std::vector nums = {6,7,8,10,11}; // lost 9
boost::find_gap(nums, 6); // will point to value 10 at index 3
```
This function is useful for validating sorted data that are expected to be consecutive integers, for example - packet ids that might be lost, unix timestamps in a video archive that might be sparsed, etc..