var positions = {
  arrivals: 0,
  immigration: 0,
  testing: 0,
  baggage: 0,
  exiting: 5,
  undefined: 0,
};

var objects = {
  immigration: [],
  immigrationQueue: [],
  passengers: [],
  testing: [],
  testingBox: [],
  testingQueue: [],
  baggage: [],
  baggageQueue: [],
};

// Get the key of a certain value by going through
// the whole object.
function getKeyByValue(object, value) {
  return Object.keys(object).find((key) => object[key] === value);
}

// How to access values through keys
objects.immigration == []; // true
let newString = immigration;
objects[newString] == []; // true