function getKoreanAltChars(code) {
    const result = disassembleKorean(code);
    if (result && result.length > 0) {
        return new Uint32Array(result);
    }
    return undefined;
}
Gets alternative Korean characters for the character code. This will return the ascii
character code(s) that a Hangul character may have been input with using a qwerty layout.

This only aims to cover modern (not archaic) Hangul syllables.

@param code The character code to get alternate characters for