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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 etm_supported(self):
 """Returns if the CPU core supports ETM. Args: self (JLink):
 the ``JLink`` instance. Returns: ``True`` if the CPU has the ETM unit, otherwise ``False``. """

        res = self._dll.JLINKARM_ETM_IsPresent()
        if (res == 1):
            return True

        # JLINKARM_ETM_IsPresent() only works on ARM 7/9 devices.  This
        # fallback checks if ETM is present by checking the Cortex ROM table
        # for debugging information for ETM.
        info = ctypes.c_uint32(0)
        index = enums.JLinkROMTable.ETM
        res = self._dll.JLINKARM_GetDebugInfo(index, ctypes.byref(info))
        if (res == 1):
            return False

        return True