add docstring explaining _get_system return value
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@ -340,6 +340,13 @@ class FilesystemController(SubiquityController, FilesystemManipulator):
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async def _get_system(
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self, variation_name, label
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) -> Tuple[Optional[SystemDetails], bool]:
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"""Return system information for a given system label.
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The return value is a SystemDetails object (if any) and True if
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the system was found in the layer that the installer is running
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in or False if the source layer needed to be mounted to find
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it.
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"""
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systems = await self.app.snapdapi.v2.systems.GET()
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labels = {system.label for system in systems.systems}
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if label in labels:
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