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Ver los componentes de una clase

Para ver los componentes de una clase

Class.getDeclaredFields(class)
Class.getDeclaredConstructors(class)
Class.getDeclaredMethods(class)

get underlying java instance for a jython object

If you have a PyObject and want to get the underlying Java instance.
All subclasses that we want to use as arguments to java methods must implement __tojava__().

   Object tmp = arg.__tojava__(Number.class):
   if (tmp != Py.NoConversion) {
       long ticks = ((Number) tmp).longValue();
   }
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