@SuppressWarnings("checkstyle:AvoidEscapedUnicodeCharacters")
    private static StringBuilder inflate(StringBuilder stringBuilder) {
        stringBuilder.append('\u0100');
        stringBuilder.setLength(0);
        return stringBuilder;
    }
Switches the internal representation of the specified {@link StringBuilder} from LATIN1 to UTF16,
so that character operations do not have performance penalty.
core/src/main/java/com/linecorp/armeria/internal/common/util/TemporaryThreadLocals.java