declare global {
    namespace Faker {
        interface Extensions {
            /**
             * It generates a random string of length 10 containing only letters.
             *
             * @example
             * ```ts
             * import fake from '@micra/faker';
             * import {alpha} from '@micra/faker/extensions/alpha';
             *
             * fake.extend({alpha});
             * fake.alpha(); // "OgegCljhGy" string of length 10 containing only letters
             * ```
             */
            alpha(): string;
            /**
             * It generates a random string with a given length containing only letters.
             *
             * @example
             * ```ts
             * import fake from '@micra/faker';
             * import {alpha} from '@micra/faker/extensions/alpha';
             *
             * fake.extend({alpha});
             * fake.alpha(5); // "nJaIp" string of length 5 containing only letters
             * ```
             */
            alpha(length: number): string;
            alpha(length?: number): string;
        }
    }
}
export {};