BearingSmoothing 
    Options that impact bearing generation to not be fixed to location's bearing but also taking into the direction to the upcoming maneuver.
Constructors
Properties
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                If enabled, the following frame's bearing won't exactly reflect the bearing returned by the Location from MapboxNavigationViewportDataSource.onLocationChanged but will also be affected by the direction to the upcoming framed geometry, to maximize the viewable area.
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                When enabled, this controls how much the following frame's bearing can deviate from the Location bearing, in degrees.