code: function choosePointInEntity(game, entity) {
    var position = game.entities.getComponent(entity, "position");
    var size = game.entities.getComponent(entity, "size");
    if (size === undefined) {
      return {
        "x": position.x,
        "y": position.y
      };
    }
    return {
      "x": random.inRange(position.x, (position.x + size.width)),
      "y": random.inRange(position.y, (position.y + size.height))
    };
  }
docs: Choose a random point inside the bounding rectangle of an entity.
  @private
  @param {object} game Required for game.entities.get().
  @param {integer} entity The id of entity to pick a point within.
  @returns {object} an point object <code>{"x": 50, "y": 50}</code>.