export interface TruncatedUtf8 {
    value: string;
    bytes: number;
}
export declare function truncateUtf8(value: string, maxBytes: number): TruncatedUtf8;
export declare function sliceUtf8(value: string, offset: number, maxBytes: number, tail?: boolean): {
    content: string;
    totalBytes: number;
    offset: number;
    returnedBytes: number;
    direction: "backward" | "forward";
    truncated: boolean;
    nextOffset: number | null;
};
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