How to use the mirakuru.base.ENV_UUID function in mirakuru

def start(self, stdout=subprocess.PIPE, stderr=subprocess.PIPE):
        """ Merged copy paste from the inheritance chain with modified stdout/err behaviour """
        if self.pre_start_check():
            # Some other executor (or process) is running with same config:
            raise AlreadyRunning(self)

        if self.process is None:
            command = self.command
            if not self._shell:
                command = self.command_parts

            env = os.environ.copy()
            env[ENV_UUID] = self._uuid
            popen_kwargs = {
                "shell": self._shell,
                "stdin": subprocess.PIPE,
                "stdout": stdout,
                "stderr": stderr,
                "universal_newlines": True,
                "env": env,
            }
            if platform.system() != "Windows":
                popen_kwargs["preexec_fn"] = os.setsid
            self.process = subprocess.Popen(command, **popen_kwargs)

        self._set_timeout()

        self.wait_for(self.check_subprocess)
        return self

"""
        if self.pre_start_check():
            # Some other executor (or process) is running with same config:
            raise AlreadyRunning(self)

        if self.process is None:
            command = self.command
            if not self._shell:
                command = self.command_parts

            if isinstance(self.stdio, (list, tuple)):
                stdin, stdout, stderr = self.stdio
            else:
                stdin = stdout = stderr = self.stdio
            env = os.environ.copy()
            env[ENV_UUID] = self._uuid
            popen_kwargs = {
                "shell": self._shell,
                "stdin": stdin,
                "stdout": stdout,
                "stderr": stderr,
                "universal_newlines": True,
                "env": env,
                "cwd": self.cwd,
            }
            if platform.system() != "Windows":
                popen_kwargs["preexec_fn"] = os.setsid
            self.process = subprocess.Popen(command, **popen_kwargs)

        self._set_timeout()

        try: