export default Substitution;
/**
 * @exports opentype.Substitution
 * @class
 * @extends opentype.Layout
 * @param {opentype.Font}
 * @constructor
 */
declare function Substitution(font: any): void;
declare class Substitution {
    /**
     * @exports opentype.Substitution
     * @class
     * @extends opentype.Layout
     * @param {opentype.Font}
     * @constructor
     */
    constructor(font: any);
    /**
     * Create a default GSUB table.
     * @return {Object} gsub - The GSUB table.
     */
    createDefaultTable(): Object;
}