protected static StringResultNode ofUncheckedUtf8Array(byte[] rawUtf8Value) {
        return new StringResultNode(rawUtf8Value);
    }
Creates a new StringResultNode backed by an underlying byte array. The input is
presumed to be in valid UTF-8 format, but is _not_ checked for validity.
searchlib/src/main/java/com/yahoo/searchlib/expression/StringResultNode.java