Force the programmer in some way to only send immutable objects over ports

[wilcowijbrandi]

A very common pitfall is that the programmer sends a data object over a port which is not really a data object.

In one case, the programmer was sending the same state object over a port and kept changing the internals of the object. This works fine in some cases, but can lead to really difficult to solve problems later on.

One way to solve this could be by only allowing serializable objects and serializing/deserializing them in the connection.