No, not this case. In http there are several key places where we have one-to-many string associations. There may be several query params with the same name. Several headers with the same name, or single header with multiple values (e.g. Accept). Using multimap there would be inconvenient. For example, most of the time you want single value from query parameter, and then you will have code like `map[name]?.singleOrNull()’ all over the place.