(buffer):Result{err, value}` - `byteLength(value):Result{err, byteLength}` - `writeInto(value, buffer, offset):Result{err, byteLength}` - `readFrom(buffer, offset):Result{err, value, byteLength}` Each method returns a result object with either an `err` or a `value` property. The `byteLength` property is only present on the `readFrom` method. The `byteLength` method does not return a `byteLength` property because it would be redundant. This allows the caller to use the `Result` in a node-style callback, `throw` the `err` property, or destructure the result object using ES2015. RWs are exported by the Thrift constructor as `thrift.TStructRW` or `thrift.getType('Service::method_args').rw`. The RW for a struct is available as a property on the struct. The RW for a struct implements the methods for reading and writing the struct. The RW for a field is available as a property on the field. The RW for a field implements the methods for reading and writing the field's type. The RW for a struct implements the `toBuffer` and `fromBuffer`