usingDeclarations.4.ts(2,5): error TS2304: Cannot find name 'using'.
usingDeclarations.4.ts(2,12): error TS2304: Cannot find name 'a'.


==== usingDeclarations.4.ts (2 errors) ====
    {
        using [a] = null;
        ~~~~~
!!! error TS2304: Cannot find name 'using'.
               ~
!!! error TS2304: Cannot find name 'a'.
    }