old_contents: import inspect as _inspect
  
  from .devicepopulator import DevicePopulator
  from .formatpopulator import FormatPopulator
  
  from .btrfs import BTRFSFormatPopulator
  from .boot import AppleBootFormatPopulator, EFIFormatPopulator, MacEFIFormatPopulator
  from .disk import DiskDevicePopulator
  from .disklabel import DiskLabelFormatPopulator
  from .dm import DMDevicePopulator
  from .dmraid import DMRaidFormatPopulator
  from .loop import LoopDevicePopulator
  from .luks import LUKSDevicePopulator, LUKSFormatPopulator
  from .lvm import LVMDevicePopulator, LVMFormatPopulator
  from .mdraid import MDDevicePopulator, MDFormatPopulator
  from .multipath import MultipathDevicePopulator
  from .optical import OpticalDevicePopulator
  from .partition import PartitionDevicePopulator
  
  __all__ = ["get_device_helper", "get_format_helper"]
  
  _device_helpers = []
  _format_helpers = []
  
  
  def _build_helper_lists():
      """Build lists of known device and format helper classes."""
      global _device_helpers  # pylint: disable=global-variable-undefined
      global _format_helpers  # pylint: disable=global-variable-undefined
      _device_helpers = []
      _format_helpers = []
      for obj in globals().values():
          if not _inspect.isclass(obj):
              continue
          elif issubclass(obj, DevicePopulator):
              _device_helpers.append(obj)
          elif issubclass(obj, FormatPopulator):
              _format_helpers.append(obj)
  
      _device_helpers.sort(key=lambda h: h.priority, reverse=True)
      _format_helpers.sort(key=lambda h: h.priority, reverse=True)
  
  _build_helper_lists()
  
  
  def get_device_helper(data):
      """ Return the device helper class appropriate for the specified data.
  
          The helper lists are sorted according to priorities defined within each
          class. This function returns the first matching class.
      """
      return next((h for h in _device_helpers if h.match(data)), None)
  
  
  def get_format_helper(data, device):
      """ Return the device helper class appropriate for the specified data.
  
          The helper lists are sorted according to priorities defined within each
          class. This function returns the first matching class.
      """
      return next((h for h in _format_helpers if h.match(data, device=device)), None)
  
new_contents: import inspect as _inspect
  
  from .devicepopulator import DevicePopulator
  from .formatpopulator import FormatPopulator
  
  from .btrfs import BTRFSFormatPopulator
  from .boot import AppleBootFormatPopulator, EFIFormatPopulator, MacEFIFormatPopulator
  from .disk import DiskDevicePopulator, iScsiDevicePopulator, FCoEDevicePopulator, MDBiosRaidDevicePopulator, DASDDevicePopulator, ZFCPDevicePopulator
  from .disklabel import DiskLabelFormatPopulator
  from .dm import DMDevicePopulator
  from .dmraid import DMRaidFormatPopulator
  from .loop import LoopDevicePopulator
  from .luks import LUKSDevicePopulator, LUKSFormatPopulator
  from .lvm import LVMDevicePopulator, LVMFormatPopulator
  from .mdraid import MDDevicePopulator, MDFormatPopulator
  from .multipath import MultipathDevicePopulator, MultipathFormatPopulator
  from .optical import OpticalDevicePopulator
  from .partition import PartitionDevicePopulator
  
  __all__ = ["get_device_helper", "get_format_helper"]
  
  _device_helpers = []
  _format_helpers = []
  
  
  def _build_helper_lists():
      """Build lists of known device and format helper classes."""
      global _device_helpers  # pylint: disable=global-variable-undefined
      global _format_helpers  # pylint: disable=global-variable-undefined
      _device_helpers = []
      _format_helpers = []
      for obj in globals().values():
          if not _inspect.isclass(obj):
              continue
          elif issubclass(obj, DevicePopulator):
              _device_helpers.append(obj)
          elif issubclass(obj, FormatPopulator):
              _format_helpers.append(obj)
  
      _device_helpers.sort(key=lambda h: h.priority, reverse=True)
      _format_helpers.sort(key=lambda h: h.priority, reverse=True)
  
  _build_helper_lists()
  
  
  def get_device_helper(data):
      """ Return the device helper class appropriate for the specified data.
  
          The helper lists are sorted according to priorities defined within each
          class. This function returns the first matching class.
      """
      return next((h for h in _device_helpers if h.match(data)), None)
  
  
  def get_format_helper(data, device):
      """ Return the device helper class appropriate for the specified data.
  
          The helper lists are sorted according to priorities defined within each
          class. This function returns the first matching class.
      """
      return next((h for h in _format_helpers if h.match(data, device=device)), None)
  
subject: add missing populators to populator.helpers