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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 additional_assets(context: Context):
 """ Collects assets from GOV.UK frontend toolkit """

    rsync_flags = '-avz' if context.verbosity == 2 else '-az'
    for path in context.app.additional_asset_paths:
        context.shell('rsync %s %s %s/' % (rsync_flags, path, context.app.asset_build_path))