The present invention accordingly provides an application debugger running in a process of a computer system comprising: a debugger memory heap; and an object copier for generating a stateful copy in the debugger memory heap of an application object at runtime wherein the application object is stored in an application memory heap of an application process. The method includes obtaining a display package having a plurality of display elements defining a plurality of display frames. period of up to 60 minutes to a temperature exceeding 280 degrees C.