HandlerAction0 is a helper for creating a Handler from a function that takes no arguments and returns an error.

HandlerAction1 is a helper for creating a Handler from a function that takes one argument and returns an error.

HandlerAction2 is a helper for creating a Handler from a function that takes two arguments and returns an error.

HandlerAction3 is a helper for creating a Handler from a function that takes two arguments and returns an error.

HandlerFunc0 is a helper for creating a Handler from a function that takes no arguments and returns a value and an error.

HandlerFunc1 is a helper for creating a Handler from a function that takes one argument and returns a value and an error.

HandlerFunc2 is a helper for creating a Handler from a function that takes two arguments and returns a value and an error.

HandlerFunc3 is a helper for creating a Handler from a function that takes three arguments and returns a value and an error.

HandlerFunc4 is a helper for creating a Handler from a function that takes four arguments and returns a value and an error.

IObserver is treated special by our JSON-RPC implementation and plays nicely with StreamJsonRpc's ideas on how to marshal an IObserver<T> in .NET.

RequestContext provides the context for a request to the server.

Session represents an active connection to the server.

Handler is the type of function that handles incoming RPC requests.