export interface InferTypeOptions {
    /**
     * When `true`, the literal string `"null"` is decoded to the `null` value.
     * Defaults to `false` (kept as the literal string `"null"`) — most CSV/URL
     * sources mean the literal string when they emit `null`.
     */
    nullLiteral?: boolean;
}
export declare function inferType(value: string, options?: InferTypeOptions): string | number | boolean | null;
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