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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def owner(self):
 """ Returns the owner of these capabilities, if any. :return: the owner, can be None :rtype: JavaObject """

        obj = javabridge.call(self.jobject, "getOwner", "()Lweka/core/CapabilitiesHandler;")
        if obj is None:
            return None
        else:
            return JavaObject(jobject=obj)