Payload<V> class abstract interface

///////////////////////////////////////////////////////////////////////////// Payload<V> ///////////////////////////////////////////////////////////////////////////// extends Struct and Payload Payload need to contain a static cast function factory Child.cast(TypedData target); convert in place, on allocated buffer build/parse with a reference to the header, although both are part of a contiguous buffer payload class without direct context of header allows stronger encapsulation does not have to declare filler header fields for simplicity, the packet header includes all meta parameters, parsing a payload does not need stateMeta