code: def resolve(self, context, provider):
          
          resolve_variables(self.variables, context, provider)
          self.blueprint.resolve_variables(self.variables)
docs: Resolve the Stack variables.
  
          This resolves the Stack variables and then prepares the Blueprint for
          rendering by passing the resolved variables to the Blueprint.
  
          Args:
              context (:class:`stacker.context.Context`): stacker context
              provider (:class:`stacker.provider.base.BaseProvider`): subclass of
                  the base provider