usingDeclarations.14.ts(1,11): error TS2850: The initializer of a 'using' declaration must be either an object with a '[Symbol.dispose]()' method, or be 'null' or 'undefined'.
  Property '[Symbol.dispose]' is missing in type '{}' but required in type 'Disposable'.


==== usingDeclarations.14.ts (1 errors) ====
    using x = {};
              ~~
!!! error TS2850: The initializer of a 'using' declaration must be either an object with a '[Symbol.dispose]()' method, or be 'null' or 'undefined'.
!!! error TS2850:   Property '[Symbol.dispose]' is missing in type '{}' but required in type 'Disposable'.
!!! related TS2728 lib.esnext.disposable.d.ts:--:--: '[Symbol.dispose]' is declared here.