Package detectors exposes functions to register and use container information extractors.

Process detects the Namespace of a layer, the features it adds/removes, and then stores everything in the database.

Version (integer) represents the worker version.

ErrParentUnknown is the error that should be raised when a parent layer has yet to be processed for the current layer.

ErrUnsupported is the error that should be raised when an OS or package manager is not supported.