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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 get_dependencies(self) -> Optional[List[str]]: """ Returns the ``apt_dependencies`` setting to a standardized format. :raise ArcaMisconfigured: if the dependencies can't be converted into a list of strings :return: List of dependencies, ``None`` if there are none. """


        if not self.apt_dependencies:
            return None

        try:
            dependencies = list([str(x).strip() for x in self.apt_dependencies])
        except (TypeError, ValueError):
            raise ArcaMisconfigured("Apk dependencies can't be converted into a list of strings")

        if not len(dependencies):
            return None

        dependencies.sort()

        return dependencies