public function testTeacher()
{
$teacher = new Teacher("Teacher");
$groupLeader = new GroupLeader("GroupLeader");
$number = 10;
for ($i = 1; $i <= $number; $i++) {
$groupLeader->addGirl(new Girl("girl:{$i}"));
}
$teacher->commond($groupLeader);
}
/**
* send commond to group leader
* @param GroupLeader $groupLeader [description]
* @return [type] [description]
*/
public function commond(GroupLeader $groupLeader)
{
$groupLeader->countGirls();
}