code: function __deserializeContent(buffer, start, options) {
  	let type, data;
  	({ anchor: start, value: type } = __deserializeType(buffer, start, options));
  	({ anchor: start, value: data } = __deserializeData(type, buffer, start, options));
  	return { anchor: start, value: data };
  }
docs: Deserialize content
  @param {ArrayBuffer} buffer
  @param {number} start - byteOffset
  @param {DeserializeOptions} options
  @returns {{anchor: number, value:*}}
  @private