This crate contains implementations of the Mutator trait of [fuzzcheck].
Very few types are supported yet. (), bool, u8-u64, i8-i64 Vec,
and Option are supported, as well as arbitrary structs and enums through the
procedural macros provided by fuzzcheck_mutators_derive. But other types of
the standard library such as String, HashMap/Set, etc. do not have default
mutators yet.
So you can fuzz-test types such as Vec<(Option<u8>, bool)> but not &str,
HashSet, etc.