401         T: ?Sized + ser::Serialize,  in serialize_newtype_struct()
414         T: ?Sized + ser::Serialize,  in serialize_newtype_variant()
429         V: ?Sized + ser::Serialize,  in serialize_some()
535         T: ?Sized + ser::Serialize,  in serialize_element()
554         T: ?Sized + ser::Serialize,  in serialize_element()
573         V: ?Sized + ser::Serialize,  in serialize_field()
592         V: ?Sized + ser::Serialize,  in serialize_field()
611         T: ?Sized + ser::Serialize,  in serialize_key()
619         T: ?Sized + ser::Serialize,  in serialize_value()
626         K: ?Sized + ser::Serialize,  in serialize_entry()
627         V: ?Sized + ser::Serialize,  in serialize_entry()
659         V: ?Sized + ser::Serialize,  in serialize_field()
679         V: ?Sized + ser::Serialize,  in serialize_field()
697     T: ?Sized + ser::Serialize,  in to_writer()
707 pub fn to_string<T>(value: &T) -> Result<String>  in to_string()