/**
 *
 * @deprecated use {@link AttributeGroupSpec} instead
 */
export class ParticleSpecification {
    /**
     *
     * @type {Array.<ParticleAttribute>}
     */
    attributes: Array<ParticleAttribute>;
    /**
     *
     * @param {string} name
     * @return {undefined|ParticleAttribute}
     */
    getByName(name: string): undefined | ParticleAttribute;
    /**
     *
     * @param {ParticleAttribute} attribute
     * @returns {ParticleSpecification}
     */
    add(attribute: ParticleAttribute): ParticleSpecification;
}
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