code: def pull_dependencies(self, nodes):
          
          visitor = DependencyFinderVisitor()
          for node in nodes:
              visitor.visit(node)
          for dependency in 'filters', 'tests':
              mapping = getattr(self, dependency)
              for name in getattr(visitor, dependency):
                  if name not in mapping:
                      mapping[name] = self.temporary_identifier()
                  self.writeline('%s = environment.%s[%r]' %
                                 (mapping[name], dependency, name))
docs: Pull all the dependencies.