docs: private static boolean shouldCheckBuffer(PrintNode node) {
      if (!(node.getExpr().getRoot() instanceof FunctionNode)) {
        return true;
      }
  
      FunctionNode fn = (FunctionNode) node.getExpr().getRoot();
      if (!(fn.getSoyFunction() instanceof BuiltinFunction)) {
        return true;
      }
  
      BuiltinFunction bfn = (BuiltinFunction) fn.getSoyFunction();
      if (bfn != BuiltinFunction.XID && bfn != BuiltinFunction.CSS) {
        return true;
      }
  
      return false;
    }