12     b_type: String,
37     fn marshal(&self) -> String {  in marshal()  argument
61     pub media_type: String,
63     protocol: String,
68     pub attributes: HashMap<String, String>,
88     pub raw_string: String,
90     origin: String,
91     session: String,
92     connection: String,
93     timing: String,
95     attributes: HashMap<String, String>,
144     fn marshal(&self) -> String {  in marshal()  argument
149             .collect::<Vec<String>>()  in marshal()
155             String::from("")  in marshal()
304     fn marshal(&self) -> String {  in marshal()  argument
386             .collect::<Vec<String>>()  in test_str()