prototype.js

// https://jsfiddle.net/pamadvmu/

function DataStream(solution, key) {
	this.solution = solution;
  this.key = key;
  this.exec = function() {
  	return 'Executing ' + this.key;
  }
}

// This allow us to create shared functions in an organized way
DataStream.prototype.toString = function() {
	return `Solution: ${this.solution} Key: ${this.key}`;
};

var getQueue = new DataStream('sky_at_bko', 'sky_at_bko_ds_get_queue');
var getAllQueues = new DataStream('sky_at_bko', 'sky_at_bko_ds_get_all_queues');


console.log(getQueue.exec());
console.log(getAllQueues.exec());

console.log(getQueue.toString());
console.log(getAllQueues.toString());