#include <FWCore/Framework/interface/GenericHandle.h>
Description: Allows interaction with data in the Event without actually using the C++ class
Usage: The GenericHandle allows one to get data back from the edm::Event as an ObjectWithDict instead of as the actual C++ class type.
make a handle to hold an instance of 'MyClass' edm::GenericHandle myHandle("MyClass");
event.getByLabel("mine",myHandle);
call the print method of 'MyClass' instance myHandle->invoke("print);