Mediator
php main.php execute in terminal
php main.php
Behavioral\Mediator\Colleague1: Alerted!Behavioral\Mediator\Colleague2: Alerted!Behavioral\Mediator\Colleague3: Alerted!
Behavioral\Mediator\Colleague1: Alerted!
Behavioral\Mediator\Colleague2: Alerted!
Behavioral\Mediator\Colleague3: Alerted!