throw new IllegalArgumentException("url can not be empty!");
}
url = appendParams(url, params);
Request.Builder builder = new Request.Builder();
appendHeaders(builder, headers);
<BUG>builder.url(url).tag(tag);

return builder.build();</BUG>
}
@Override

throw new IllegalArgumentException("url can not be empty!");
}
url = appendParams(url, params);
Request.Builder builder = new Request.Builder();
appendHeaders(builder, headers);
return builder.url(url).tag(tag).build();
}
@Override
