/**
 * Pad to the next alignment boundary
 * @param {Uint8Array} data Uint8Array data to pad
 * @param {number} alignment Alignment boundary to fulfill
 * @param {number} padCharacter Character to fill with
 * @returns {Uint8Array} Padded UInt8Array image
 */
export declare function padTo(data: Uint8Array, alignment: number, padCharacter?: number): Uint8Array;