export declare function isRecord(value: unknown): value is Record<string, unknown>;
export declare function asRecord(value: unknown): Record<string, unknown> | undefined;
export declare function isNonEmptyString(value: unknown): value is string;
export declare function stringField(record: Record<string, unknown> | undefined, field: string): string | undefined;
export declare function numberField(record: Record<string, unknown> | undefined, field: string): number | undefined;
export declare function singleLine(value: string): string;
export declare function singleLineForActivity(value: string): string;
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