Programmatically access local offsets (actually tracked in events) also after the serialization

[abrasat]

During the serialization, the events OnMemberSerializing, OnMemberSerialized return also the information about the offset of each property inside the stream generated during the serialization ( #67 ). Is it possible to get programmatically the stream offsets for the different properties from the c# classes after being serialized? I mean something like a GetOffset(nameof(xxx). Or maybe add an option to the Serialize() method to generate a dictionary during the serialization, having the property path as key and the offset inside the serialized stream as value