Visitable

interface Visitable<T : Any!>

A generic interface for classes that accept a visitor.

abstract fun accept(visitor: T): Unit

Accept the visitor

Feature	`open class Feature : GeoJsonObject, Visitable<GeoJsonObjectVisitor!>, Serializable` Represents a spatially bound entity. Consists of a `Geometry` object and an id. Both are optional. If geometry is absent, the feature is unlocated.
GeoJsonObject	`abstract class GeoJsonObject : Visitable<GeoJsonObjectVisitor!>, Serializable` A GeoJsonObject representing a Geometry, Feature, or collection of Features.