1digraph G {
2   node [shape=plaintext fontsize=12];
3   graph [rankdir=LR];
4
5   subgraph cluster_0 {
6        node [shape=box];
7        label="PTY"
8        "Master" -> "Slave" [dir=both arrowsize=.5];
9    }
10
11   "ACRN-DM" -> "Master" [arrowsize=.5];
12   "Slave" -> "User VM:/dev/ttyS1" [arrowsize=.5];
13
14}
15