How to use the platformio.pkgmanager.PackageManager function in platformio

self.pkg_aliases_to_names(without_packages or []))

        upkgs = with_packages | without_packages
        ppkgs = set(self.get_packages().keys())
        if not upkgs.issubset(ppkgs):
            raise exception.UnknownPackage(", ".join(upkgs - ppkgs))

        requirements = []
        for name, opts in self.get_packages().items():
            if name in without_packages:
                continue
            elif (name in with_packages or (not skip_default_packages and
                                                opts.get("default"))):
                requirements.append(name)

        pm = PackageManager()
        for name in requirements:
            pm.install(name)

        # register installed platform
        data = get_state_item("installed_platforms", [])
        if self.get_type() not in data:
            data.append(self.get_type())
            set_state_item("installed_platforms", data)

        return len(requirements)

self.pkg_aliases_to_names(without_packages or []))

        upkgs = with_packages | without_packages
        ppkgs = set(self.get_packages().keys())
        if not upkgs.issubset(ppkgs):
            raise exception.UnknownPackage(", ".join(upkgs - ppkgs))

        requirements = []
        for name, opts in self.get_packages().items():
            if name in without_packages:
                continue
            elif (name in with_packages or (not skip_default_packages and
                                                opts.get("default"))):
                requirements.append(name)

        pm = PackageManager()
        for name in requirements:
            pm.install(name)

        # register installed platform
        data = get_state_item("installed_platforms", [])
        if self.get_type() not in data:
            data.append(self.get_type())
            set_state_item("installed_platforms", data)

        return len(requirements)

def get_installed_packages(self):
        pm = PackageManager()
        return [n for n in self.get_packages().keys() if pm.is_installed(n)]

def get_installed_packages(self):
        pm = PackageManager()
        return [n for n in self.get_packages().keys() if pm.is_installed(n)]

self.pkg_aliases_to_names(without_packages or []))

        upkgs = with_packages | without_packages
        ppkgs = set(self.get_packages().keys())
        if not upkgs.issubset(ppkgs):
            raise exception.UnknownPackage(", ".join(upkgs - ppkgs))

        requirements = []
        for name, opts in self.get_packages().items():
            if name in without_packages:
                continue
            elif (name in with_packages or (not skip_default_packages and
                                                opts.get("default"))):
                requirements.append(name)

        pm = PackageManager()
        for name in requirements:
            pm.install(name)

        # register installed platform
        data = get_state_item("installed_platforms", [])
        if self.get_type() not in data:
            data.append(self.get_type())
            set_state_item("installed_platforms", data)

        return len(requirements)

def update(self):
        pm = PackageManager()
        for name in self.get_installed_packages():
            pm.update(name)

def uninstall(self):
        platform = self.get_type()
        installed_platforms = PlatformFactory.get_platforms(
            installed=True).keys()

        if platform not in installed_platforms:
            raise exception.PlatformNotInstalledYet(platform)

        deppkgs = set()
        for item in installed_platforms:
            if item == platform:
                continue
            p = PlatformFactory.newPlatform(item)
            deppkgs = deppkgs.union(set(p.get_packages().keys()))

        pm = PackageManager()
        for name in self.get_packages().keys():
            if not pm.is_installed(name) or name in deppkgs:
                continue
            pm.uninstall(name)

        # unregister installed platform
        installed_platforms.remove(platform)
        set_state_item("installed_platforms", installed_platforms)

        return True

def get_installed_packages(self):
        pm = PackageManager()
        return [n for n in self.get_packages().keys() if pm.is_installed(n)]

def is_outdated(self):
        pm = PackageManager()
        obsolated = pm.get_outdated()
        return not set(self.get_packages().keys()).isdisjoint(set(obsolated))