/**
 * Abortable type guard and symbol.
 *
 * Extracted to a separate file to avoid circular dependencies
 * between safe.ts and abortable.ts.
 */
/**
 * Symbol used to identify Abortable functions.
 * @internal
 */
export declare const abortableSymbol: unique symbol;
/**
 * Check if a value is an Abortable function.
 *
 * @example
 * ```ts
 * if (isAbortable(fn)) {
 *   fn.withSignal(signal, ...args);
 * }
 * ```
 */
export declare function isAbortable(fn: unknown): fn is {
    withSignal: Function;
};
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