code: func DebugPrintAt(image *ebiten.Image, str string, x, y int) {
  	drawDebugText(image, str, x+1, y+1, true)
  	drawDebugText(image, str, x, y, false)
  }
docs: // DebugPrintAt draws the string str on the image at (x, y) position.
  //
  // The available runes are in U+0000 to U+00FF, which is C0 Controls and Basic Latin and C1 Controls and Latin-1 Supplement.