code: def instantiate_components(self, context):
          
          with use_ipopo(context) as ipopo:
              for name, (factory, properties) in self.__state.components.items():
                  ipopo.instantiate(factory, name, properties)
docs: Instantiate the defined components
  
          .. note::
             This method requires the iPOPO core service to be registered.
             This means that the ``pelix.ipopo.core`` must have been declared in
             the list of bundles (or installed and started programmatically).
  
          :param context: A :class:`~pelix.framework.BundleContext` object
          :raise BundleException: Error looking for the iPOPO service or
                                  starting a component