digraph "abstractio" {
charset="utf-8"
rankdir=BT
"41" [label="{MemIO|\l|close()\lflush()\lmkdir(parents, exist_ok)\lopen(mode)\lread(length)\lseek(position)\lwrite(data)\l}", shape="record"];
"44" [label="{NullIO|\l|close()\lflush()\lmkdir()\lopen(mode)\lread(length)\lwrite(data)\l}", shape="record"];
}