code: def prepare(self, node):
          
          super(TypeDependencies, self).prepare(node)
          for v in self.global_declarations.values():
              self.result.add_node(v)
          self.result.add_node(TypeDependencies.NoDeps)
docs: Add nodes for each global declarations in the result graph.
  
          No edges are added as there are no type builtin type dependencies.