/** @format */
import { HuffmanTree } from './webp-huffman-tree.js';
/**
 * A group of Huffman trees.
 */
export declare class HuffmanTreeGroup {
    /**
     * Array of HuffmanTree instances.
     */
    private readonly _htrees;
    /**
     * Gets the array of HuffmanTree instances.
     * @returns {HuffmanTree[]} The array of HuffmanTree instances.
     */
    get htrees(): HuffmanTree[];
    /**
     * Constructs a new HuffmanTreeGroup.
     */
    constructor();
    /**
     * Gets the HuffmanTree at the specified index.
     * @param {number} index - The index of the HuffmanTree to retrieve.
     * @returns {HuffmanTree} The HuffmanTree at the specified index.
     */
    getAt(index: number): HuffmanTree;
}