code: def unique_def_name(self, stmt, inrpc=False):
          
          module = stmt.main_module()
          name = ""
          while True:
              pref = stmt.arg if stmt.arg else stmt.keyword
              name = "__" + pref + name
              if stmt.keyword == "grouping": name = "_" + name
              if stmt.parent.parent is None: break
              stmt = stmt.parent
          defs = (self.global_defs
                  if stmt.keyword in ("grouping", "typedef")
                  else self.local_defs)
          if inrpc: name += "__rpc"
          return (module.arg + name, defs)
docs: Mangle the name of `stmt` (typedef or grouping).
  
          Return the mangled name and dictionary where the definition is
          to be installed. The `inrpc` flag indicates when we are inside
          an RPC, in which case the name gets the "__rpc" suffix.