pub trait Target {
// Required methods
fn base_url(&self) -> &'static str;
fn method(&self) -> HTTPMethod;
fn path(&self) -> String;
fn query(&self) -> HashMap<&'static str, &'static str>;
fn headers(&self) -> HashMap<&'static str, &'static str>;
fn authentication(&self) -> Option<AuthMethod>;
fn body(&self) -> HTTPBody;
// Provided methods
fn query_string(&self) -> String { ... }
fn absolute_url(&self) -> String { ... }
}