https://doc.rust-lang.org/stable/std/string/

https://doc.rust-lang.org/stable/std/primitive.str.html

https://doc.rust-lang.org/stable/std/string/struct.String.html
https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html

https://doc.rust-lang.org/stable/std/string/trait.ToString.html