docs: public Surface concatenate (AffineTransform xf, float originX, float originY) {
      AffineTransform txf = tx();
      Transforms.multiply(txf, xf.m00, xf.m01, xf.m10, xf.m11, xf.tx, xf.ty, txf);
      if (originX != 0 || originY != 0) txf.translate(-originX, -originY);
      return this;
    }