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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 kernel(self):
 """ Returns the current kernel. :return: the kernel or None if none found :rtype: Kernel """

        result = javabridge.static_call(
            "weka/classifiers/KernelHelper", "getKernel",
            "(Ljava/lang/Object;)Lweka/classifiers/functions/supportVector/Kernel;",
            self.jobject)
        if result is None:
            return None
        else:
            return Kernel(jobject=result)