argouml model copi helper copi java lang object java lang object make copi element given namespac function dispatch call copi element element namespac function xxx factori function fail follow reason ol li copi function known element type li copi function fail ol param anel element copi param an namespac copi element illeg argument except element object copi object anel object an don explicitli check element model element element model element anel namespac ns namespac an element uml model impl model manag factori copi element ns element uml model impl core factori copi element ns element data type model impl core factori copi data type element ns element model impl core factori copi element ns element featur model impl core factori copi featur element ns element stereotyp model impl extens mechan factori copi stereotyp element ns element tag definit model impl extens mechan factori copi tag definit element ns illeg argument except anel anel an an 