declare var Matter: any;
/**
 * An attractors plugin for matter.js.
 * See the readme for usage and examples.
 * @module MatterAttractors
 */
declare var MatterAttractors: any;
/**
 * @namespace Matter.Body
 * @see http://brm.io/matter-js/docs/classes/Body.html
 */
/**
 * This plugin adds a new property `body.plugin.attractors` to instances of `Matter.Body`.
 * This is an array of callback functions that will be called automatically
 * for every pair of bodies, on every engine update.
 * @property {Function[]} body.plugin.attractors
 * @memberof Matter.Body
 */
/**
 * An attractor function calculates the force to be applied
 * to `bodyB`, it should either:
 * - return the force vector to be applied to `bodyB`
 * - or apply the force to the body(s) itself
 * @callback AttractorFunction
 * @param {Matter.Body} bodyA
 * @param {Matter.Body} bodyB
 * @returns {(Vector|undefined)} a force vector (optional)
 */