Function rustc_mir::util::graphviz::write_graph_label

pub(in util::graphviz) fn write_graph_label<'tcx, W: Write>(
    tcx: TyCtxt<'tcx>, 
    body: &Body<'_>, 
    w: &mut W
) -> Result<()>

Write the graphviz DOT label for the overall graph. This is essentially a block of text that will appear below the graph, showing the type of the fn this MIR represents and the types of all the variables and temporaries.