code: function amf0decUString(buf) {
      var sLen = buf.readUInt16BE(0);
      return { len: 2 + sLen, value: buf.toString('utf8', 2, 2 + sLen) }
  }
docs: AMF0 Decode Untyped (without the type byte) String
  @param buf
  @returns {{len: *, value: (*|string|String)}}