<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def dump(self, obj):
 """ Dumps the given object in the Java serialization format """

        self.references = []
        self.object_obj = obj
        self.object_stream = BytesIO()
        self._writeStreamHeader()
        self.writeObject(obj)
        return self.object_stream.getvalue()