---
source: hydroflow/tests/surface_context.rs
expression: "df.meta_graph().unwrap().to_mermaid(&Default::default())"
---
%%{init:{'theme':'base','themeVariables':{'clusterBkg':'#ddd','clusterBorder':'#888'}}}%%
flowchart TD
classDef pullClass fill:#8af,stroke:#000,text-align:left,white-space:pre
classDef pushClass fill:#ff8,stroke:#000,text-align:left,white-space:pre
classDef otherClass fill:#fdc,stroke:#000,text-align:left,white-space:pre
linkStyle default stroke:#aaa
1v1[\"(1v1) <code>source_iter([()])</code>"/]:::pullClass
2v1[\"(2v1) <code>map(|_| context.current_tick_start())</code>"/]:::pullClass
3v1[\"(3v1) <code>defer_tick()</code>"/]:::pullClass
4v1[\"(4v1) <code>assert(|t: &amp;hydroflow::web_time::SystemTime| t.elapsed().unwrap().as_nanos() &gt; 0)</code>"/]:::pullClass
5v1[/"<div style=text-align:center>(5v1)</div> <code>for_each(|t: hydroflow::web_time::SystemTime| {<br>    println!(&quot;Time between ticks: {:?}&quot;, t.elapsed())<br>})</code>"\]:::pushClass
6v1["(6v1) <code>handoff</code>"]:::otherClass
7v1[\"(7v1) <code>identity()</code>"/]:::pullClass
8v1["(8v1) <code>handoff</code>"]:::otherClass
4v1-->5v1
3v1-->4v1
2v1-->6v1
1v1-->2v1
6v1-->7v1
7v1-->8v1
8v1--o3v1; linkStyle 6 stroke:red
subgraph sg_1v1 ["sg_1v1 stratum 0"]
    1v1
    2v1
end
subgraph sg_2v1 ["sg_2v1 stratum 0"]
    3v1
    4v1
    5v1
end
subgraph sg_3v1 ["sg_3v1 stratum 1"]
    7v1
end