docs: def set_quota(self, quota_bytes):
          """
          Set a quota (in bytes) on this user library.  The quota is 'best effort',
          and should be set conservatively.
  
          A quota of 0 is 'unlimited'
          """
          self.set_library_metadata(ArcticLibraryBinding.QUOTA, quota_bytes)
          self.quota = quota_bytes
          self.quota_countdown = 0