,---------------.
               |Level 1        |
               |---------------|
               |  |_ Level 3a  |
,-----------.  |  |_ Level 3b  |
|Component A|  |  |_ Level 3c  |
|-----------|--|    |_ Level 4a|
`-----------'  |  |_ Level 3d  |
               ||_ Level 2b    |
               |  |_ Level 3e  |
               |               |
               `---------------'