/**
 * Compares two BigNumbers.
 * @param {BigNumber} a - First value to compare
 * @param {BigNumber} b - Second value to compare
 * @param {number} [relTol=1e-09] - The relative tolerance, indicating the maximum allowed difference relative to the larger absolute value. Must be greater than 0.
 * @param {number} [absTol=0] - The minimum absolute tolerance, useful for comparisons near zero. Must be at least 0.
 * @returns {boolean} whether the two numbers are nearly equal
 * @throws {Error} If `relTol` is less than or equal to 0.
 * @throws {Error} If `absTol` is less than 0.
 *
 * @example
 * nearlyEqual(1.000000001, 1.0, 1e-9);            // true
 * nearlyEqual(1.000000002, 1.0, 0);            // false
 * nearlyEqual(1.0, 1.009, undefined, 0.02);       // true
 * nearlyEqual(0.000000001, 0.0, undefined, 1e-8); // true
 */
export declare function nearlyEqual(a: unknown, b: unknown, relTol?: number, absTol?: number): boolean;
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