code: def register(self):
          
  
          self._set_defaults()
  
          all_satchels[self.name.upper()] = self
  
          manifest_recorder[self.name] = self.record_manifest
  
          # Register service commands.
          if self.required_system_packages:
              required_system_packages[self.name.upper()] = self.required_system_packages
docs: Adds this satchel to the global registeries for fast lookup from other satchels.