background property
The paint drawn as a background for the text.
The value should ideally be cached and reused each time if multiple text styles are created with the same paint settings. Otherwise, each time it will appear like the style changed, which will result in unnecessary updates all the way through the framework.
workaround for 24335 issue https://github.com/flutter/flutter/issues/24335 https://github.com/flutter/flutter/issues/24337 we will draw background by ourself
Implementation
final Paint background;