export declare function expectNonEmptyString(input: Record<string, unknown>, key: string): string;
export declare function expectOptionalBoolean(input: Record<string, unknown>, key: string): boolean | undefined;
export declare function expectOptionalNumber(input: Record<string, unknown>, key: string): number | undefined;
export declare function formatWithLineNumbers(text: string, startLine?: number, limit?: number): string;
export declare function toJson(input: unknown): string;
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