toProps method
Returns a Map with the CssClassPropsMixin.className and CssClassPropsMixin.classNameBlacklist props populated from the return values of toClassName and toClassNameBlacklist, respectively.
This method, along with addFromProps, is useful for merging sets of className/blacklist props.
Implementation
Map toProps() {
return CssClassPropsMapView({})
..className = toClassName()
..classNameBlacklist = toClassNameBlacklist();
}