impl crate::traits::QueryString for crate::address_validation::validate_address::Request<'_> {
/// Builds the URL [query string](https://en.wikipedia.org/wiki/Query_string)
/// for the HTTP request. The query string is generated from the data found
/// in this `Request` structure.
///
/// ## Arguments
///
/// This method accepts no arguments.
///
/// ## Notes
///
/// * The Address Validation API mostly uses the HTTP body for the request.
fn query_string(&self) -> String {
format!("key={}", self.client.key)
} // fn
} // impl