private boolean equalsFast(StringMultimap<IN_NAME, NAME> that) {
        Entry e = firstGroupHead.after;
        while (e != firstGroupHead) {
            final NAME name = e.getKey();
            if (!getAllReversed(name).equals(that.getAllReversed(name))) {
                return false;
            }
            e = e.after;
        }
        return true;
    }
Removes all the entries whose hash code equals {@code h} and whose name is equal to {@code name}.

@return the first value inserted, or {@code null} if there is no such entry.
core/src/main/java/com/linecorp/armeria/common/StringMultimap.java