roundCornerNear

open fun roundCornerNear(x: Double, y: Double, radius: Double, sides: Int): Polygon
open fun roundCornerNear(x: Double, y: Double, radius: Double): Polygon
open fun roundCornerNear(point: Vector2, radius: Double, sides: Int): Polygon
open fun roundCornerNear(point: Vector2, radius: Double): Polygon