@Override
    public final boolean containsBoolean(IN_NAME name, boolean value) {
        return contains(name, actual -> {
            final Boolean maybeBoolean = toBooleanOrNull(actual);
            return maybeBoolean != null && maybeBoolean == value;
        });
    }
Validates the given user-specified {@code value}.
core/src/main/java/com/linecorp/armeria/common/StringMultimap.java