//! The graph layouts the diagrams share, as Pele's src/layout has them: the layered layout of
//! one flat graph, the compound layout of a graph whose nodes are nested in groups, the lane
//! layout of swimlanes, and the wrapping of a graph's disconnected parts into rows.
// The ports go over arrays by index, as Pele's code does, so that the two read side by side.
pub
pub
pub
pub