docs: public static double normalizeRadians(double r) {
          if (r < 0 && r >= -TWO_PI) return r + TWO_PI;
          if (r >= TWO_PI && r < FOUR_PI) return r - TWO_PI;
          if (r >= 0 && r < TWO_PI) return r;
  
          r -= TWO_PI * Math.floor(r * TWO_PI_INVERSE);
          if (r < 0.) r += TWO_PI;
  
          return r;
      }