code: void insertPoint(int pathIndex, int beforePointIndex, Point2D pt) {
  		m_impl.insertPoint(pathIndex, beforePointIndex, pt);
  	}
docs: Inserts a point.
  
  @param pathIndex
  The path index in this class to insert the point to. Must
  correspond to an existing path.
  @param beforePointIndex
  The point index in the given path of this multipath. This
  value must be between 0 and GetPathSize(pathIndex), or -1 to
  insert the point at the end of the given path.
  @param pt
  The point to be inserted.