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impl crate::directions::Request<'_> {
/// Specify the mode of transportation.
///
/// ## Arguments
///
/// * `travel_mode` ‧ The mode of transportation that directions should be
/// calculated for. For example, _transit_ directions or car _driving_
/// directions.
///
/// ## Description
///
/// [Travel Modes](https://developers.google.com/maps/documentation/directions/intro#TravelModes)
///
/// When you calculate directions, you may specify the transportation mode
/// to use. By default, directions are calculated as driving directions. The
/// following travel modes are supported:
///
/// * `TravelMode::Driving` (default) indicates standard driving directions
/// using the road network.
///
/// * `TravelMode::Walking` requests walking directions via pedestrian paths
/// & sidewalks (where available).
///
/// * `TravelMode::Bicycling` requests bicycling directions via bicycle
/// paths & preferred streets (where available).
///
/// * `TravelMode::Transit` requests directions via public transit routes
/// (where available). If you set the travel mode to
/// `TravelMode::Transit`, you can optionally use either
/// `with_departure_time()` or `with_arrival_time()` methods. If neither
/// time is specified, the departure time defaults to now (that is, the
/// departure time defaults to the current time). You can also optionally
/// use `with_transit_mode()` and/or `with_transit_route_preference()`
/// methods.
///
/// _Note_: Both walking and bicycling directions may sometimes not include
/// clear pedestrian or bicycling paths, so these directions will return
/// `warnings` in the returned result which you must display to the user.
///
/// ## Example
///
/// * Set travel mode to transit:
/// ```rust
/// .with_travel_mode(TravelMode::Transit)
/// ```
#[must_use] pub fn with_travel_mode(
mut self,
travel_mode: impl Into<crate::directions::TravelMode>
) -> Self {
self.travel_mode = Some(travel_mode.into());
self
} // fn
} // impl