TunnelSection 
    class TunnelSection(val sectionLocation: SectionLocation, val routeOffset: Distance, val length: Distance) : Section
Represents a route section that is a tunnel.
See also
Properties
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                  Distance from the the start point to the end point of the sectionLocation.
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                  Distance from the start of the route to the start point of the sectionLocation.
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                  Information about the location of a section on a route's geometry.
Functions
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                  Returns geometry property of the class.
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                  Returns routeOffset property of the class.
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                  Returns length property of the class.