code: public void setParamsToRuntimeCheck(Predicate<String> paramNames) {
      checkState(this.paramsToRuntimeTypeCheck == null);
      this.paramsToRuntimeTypeCheck = checkNotNull(paramNames);
    }
docs: Sets the names of the params that require runtime type checking against callee's types.
  
  <p>This mechanism is used by the TOFU runtime only to save some work when calling templates.