/// <summary>
/// public method that adds robots (<see cref="IRobot"/> objects) on to the production line.
/// </summary>
/// <param name="robotsToAdd">An array of type <see cref="IRobot"/> defining the robots to add to the production line.</param>
public void AddRobots(params IRobot[] robotsToAdd)
{
if (robotsToAdd?.Count() > 0)
{
Robots.AddRange(robotsToAdd);
}
}