Parent1 -> Child1
                Child2 -> Child2.1 -> Child2.1.1
                Child3    Child2.2    Child2.1.2 -> Child2.1.2.1 ....
                           Child2.3 ...
                           Child2.4 -> Child2.4.1
                                       Child2.4.2 -> Child2.4.2.1
                                       Child2.4.3 ...