graph TD
subgraph one
    A["VcpuManager"]
end
A --> B
---
+-----------------+
|       one       |
|                 |
|                 |
| +-------------+ |
| |             | |
| | VcpuManager | |
| |             | |
| +-------------+ |
|        |        |
+--------|--------+
         |         
         |         
         v         
  +-------------+  
  |             |  
  |      B      |  
  |             |  
  +-------------+  