<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def value(self):
 """Value of the variable, as bytes. See https://cloud.google.com/deployment-manager/runtime-configurator/reference/rest/v1beta1/projects.configs.variables :rtype: bytes or ``NoneType`` :returns: The value of the variable or ``None`` if the property is not set locally. """

        value = self._properties.get("value")
        if value is not None:
            value = base64.b64decode(value)
        return value