code: function decomposeSyllable(codePoint) {
    const sylSIndex = codePoint - SBASE;
    const sylTIndex = sylSIndex % TCOUNT;
    return String.fromCharCode(LBASE + sylSIndex / NCOUNT)
         + String.fromCharCode(VBASE + (sylSIndex % NCOUNT) / TCOUNT)
         + ((sylTIndex > 0) ? String.fromCharCode(TBASE + sylTIndex) : '');
  }
docs: Maps one Hangul Syllable code-point to the equivalent Hangul
  Conjoining Jamo characters, as defined in UnicodeData.txt.
  
  @param {number} codePoint  One Unicode character
  @output {string}