Interface ObjectDescriptor

In case of a string, it is the name of the event. In case of a FunctionDescriptor the Name property is the event name, the rest applies to the handler function.

List of functions we want to expose on the proxy object. Default return behavior is 'async'.

List of properties we want to expose on the proxy object.

Since readonly property values don't change, they are sent to the other side, instead of generating a getter.