A flat graph fragment. No returned node names an existing on-canvas parent — nesting travels in RawNode.children. An edges-only result is legal: edges whose endpoints are all already on canvas become triage rows of their own.
RawNode.children
A flat graph fragment. No returned node names an existing on-canvas parent — nesting travels in
RawNode.children. An edges-only result is legal: edges whose endpoints are all already on canvas become triage rows of their own.