31     def is_present(cls):  argument
33         return shutil.which(cls.name) is not None
111     def get_names(cls):  argument
113         return list(runtime.name for runtime in cls.runtimes)
116     def get(cls, name):  argument
118         for runtime in cls.runtimes:
126     def find(cls):  argument
128         for runtime in cls.runtimes:
150         cls = Runtimes.get(args.runtime) if args.runtime else Runtimes.find()
154     logger.debug("runtime: %s", cls.name)
156     return cls(args, logger).run(args.image, args.cmd)