ExampleLightHandler = function ExampleLightHandler(gladys, client) {
  this.client = client;
  this.gladys = gladys;
}
@description Add ability to control a light.
@param {object} gladys - Gladys instance.
@param {object} client - Third-part client object.
@example
const exampleLightHandler = new ExampleLightHandler(gladys, client);