s3-query-json/lib/asserts.d.ts

Query (ND)JSON files on S3

export declare function assertIsString(input: any, errorMessage: string): asserts input is string;
export declare function optionalIn<T>(input: any | any[], collection: T[], errorMessage: string): asserts input is T;
export declare function assert(statement: boolean, errorMessage: any): asserts statement is true;