def addActionProvider(provider_name):
    """ Register an IActionProvider to the set queried by this tool.

        o 'provider_name' is appended to the set of names already registered
          with the tool.

        o Raise ComponentLookupError if no utility of that name is registered
          for IActionProvider.

        o Deprecated: In the future, expect to use 'getUtilitiesFor' instead
          (presuming either that ordering either doesn't matter or that
          ordering is supported by the utility registry).

        o Permission:  Manage portal
        """
