in common/base/src/url.rs [85:96]
fn encode_param(&self) -> String {
let mut params_vec: Vec<String> = Vec::new();
for (k, v) in self.params.iter() {
// let tmp = format!("{}={}", k, v);
params_vec.push(format!("{}={}", k, v));
}
if params_vec.is_empty() {
"".to_string()
} else {
format!("?{}", params_vec.join("&"))
}
}