- iset-search! iset element failure successprocedure
The `iset-search!` procedure is the same as `iset-search`, except that it is permitted to mutate and return the iset argument rather than allocating a new iset.
The `iset-search!` procedure is the same as `iset-search`, except that it is permitted to mutate and return the iset argument rather than allocating a new iset.