code: def _make_proxy(self, varname, parent=None, constructor=MlabObjectProxy):
          
          # FIXME why not just use gensym here?
          proxy_val_name = "PROXY_VAL%d__" % self._proxy_count
          self._proxy_count += 1
          mlabraw.eval(self._session, "%s = %s;" % (proxy_val_name, varname))
          res = constructor(self, proxy_val_name, parent)
          self._proxies[proxy_val_name] = res
          return res
docs: Creates a proxy for a variable.
  
          XXX create and cache nested proxies also here.