code: public static Polygon circle(@NonNull Point center, double radius,
                                 @TurfConstants.TurfUnitCriteria String units) {
      return circle(center, radius, DEFAULT_STEPS, units);
    }
docs: Takes a {@link Point} and calculates the circle polygon given a radius in degrees, radians,
  miles, or kilometers; and steps for precision. This uses the {@link #DEFAULT_STEPS}.
  
  @param center a {@link Point} which the circle will center around
  @param radius the radius of the circle
  @param units  one of the units found inside {@link TurfConstants.TurfUnitCriteria}
  @return a {@link Polygon} which represents the newly created circle
  @since 3.0.0