def interface_version(self):
        """
        Returns an integer specifying the version of the EMM Plugin interface
        supported by the plugin implementation. Should always return 1 for
        implementations of this version of the specification.
        """

        Returns an integer specifying the version of the EMM Plugin interface
        supported by the plugin implementation. Should always return 1 for
        implementations of this version of the specification.
        
numba/cuda/cudadrv/driver.py