// Verify that FunctionDef ArgDef has attributes.
  ASSERT_EQ(func_->record->fdef().arg_attr_size(), 1);
  auto arg_attrs = func_->record->fdef().arg_attr().find(0);
  ASSERT_NE(arg_attrs, func_->record->fdef().arg_attr().end());
  auto iter = arg_attrs->second.attr().find("_test_attr");
  ASSERT_NE(iter, arg_attrs->second.attr().end());
  EXPECT_EQ(iter->second.s(), "value");
}

.svgFilters&&(R(Ne,x),R(Re,P),R(Re,H)),!0===$e.mathMl&&(R(Ne,I),R(Re,F),R(Re,H))),_(e,"ADD_TAGS")||(ke.tagCheck=null),_(e,"ADD_ATTR")||(ke.attributeCheck=null),e.ADD_TAGS&&("function"==typeof e.ADD_TAGS?ke.tagCheck=e.ADD_TAGS:(Ne===De&&(Ne=C(Ne)),R(Ne,e.ADD_TAGS,ft))),e.ADD_ATTR&&("function"==typeof e.ADD_ATTR?ke.attributeCheck=e.ADD_ATTR:(Re===we&&(Re=C(Re)),R(Re,e.ADD_ATTR,ft))),e.ADD_URI_SAFE_ATTR&&R(Qe,e.ADD_URI_SAFE_ATTR,ft),e.FORBID_CONTENTS&&(Ke===Ve&&(Ke=C(Ke)),R(Ke,e.FORBID_CONTENTS,ft)...