isolatedDeclarationsTypePredicate.ts(1,17): error TS9007: Function must have an explicit return type annotation with --isolatedDeclarations.


==== isolatedDeclarationsTypePredicate.ts (1 errors) ====
    export function isString(value: unknown) {
                    ~~~~~~~~
!!! error TS9007: Function must have an explicit return type annotation with --isolatedDeclarations.
!!! related TS9031 isolatedDeclarationsTypePredicate.ts:1:17: Add a return type to the function declaration.
      return typeof value === "string";
    }
    
    export function isExplicitString(value: unknown): value is string {
      return typeof value === "string";
    }
    