whole_func_string: function PartialHull(a, b, idx, lowerIds, upperIds) {
    this.a = a
    this.b = b
    this.idx = idx
    this.lowerIds = lowerIds
    this.upperIds = upperIds
  }
func_code_string: function PartialHull(a, b, idx, lowerIds, upperIds) {
    this.a = a
    this.b = b
    this.idx = idx
    this.lowerIds = lowerIds
    this.upperIds = upperIds
  }
func_documentation_string: A partial convex hull fragment, made of two unimonotone polygons