Variable PNG_GRAY_10x10Const
PNG_GRAY_10x10: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKBAMAAAB/HNKOAAAAMFBMVEXIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMgyCeFrAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAC0lEQVQIHWOgAAAAADwAAZFvo9AAAAAASUVORK5CYII="
Example Blob Fixture for 10×10 Gray PNG.