digraph "Mailboxes"
{
  edge [fontname="Helvetica",fontsize="10",labelfontname="Helvetica",labelfontsize="10"];
  node [fontname="Helvetica",fontsize="10",shape=box];
  rankdir=LR;
  Node1 [label="Mailboxes",height=0.2,width=0.4,color="black", fillcolor="grey75", style="filled", fontcolor="black",tooltip=" "];
  Node2 [label="OS abstraction layer",height=0.2,width=0.4,color="black", fillcolor="white", style="filled",URL="$group__sys__os.html",tooltip=" "];
  Node2->Node1 [shape=plaintext, dir="back", style="solid"];
}