@Nullable
        static MediaType get(String input) {
            return KNOWN_TYPES_BY_STRING.get(input);
        }
Returns {@code true} if {@code actualParameters} contains all entries of {@code expectedParameters}.
Note that this method does <b>not</b> require {@code actualParameters} to contain <b>only</b> the
entries of {@code expectedParameters}. i.e. {@code actualParameters} can contain an entry that's
non-existent in {@code expectedParameters}.
core/src/main/java/com/linecorp/armeria/common/MediaType.java