code: public static void writeMapEntry(OutputAccessor out, String key, Object value) {
  
          out.write((byte) '\"');
  
          if (key == null)
              out.write(NULL);
          else {
              writeUtf8(out, key);
          }
  
          out.write(Q_AND_C);
  
          toJSONString(out, value);
      }
docs: Write a map entry.
  
  @param out
  @param key
  @param value