What happened to the @helper directive in Razor ?

[Bartmax]

@helper BgImage(string url){
    <a style="background-image:url(@url)"></a> 
}

result:
The helper directive is not supported.

[NTaylorMullen]

@helper was removed a while back due to Razor content now being async. At some point we had intention to re-add it but it's since fallen out of scope.

[Bartmax]

ok, ty .