export declare function checkThat(evaluationResult: boolean, message?: string): void;
export declare function checkDefined<T>(value: T | undefined, message?: string): T;
export declare function checkNotNull<T>(value: T | null, message?: string): T;
export declare function checkArrayNotEmpty<T>(array: T[], message?: string): T[];
export declare function getSingleElement<T>(iterable: Iterable<T>, nameWithinMessage?: string): T;
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