parentConstructId

Construct-side compound-node parent for renderers that support compound nodes (cytoscape's data.parent). Set by the loader on CodeInstruction views to the id of their enclosing CodeFunction view's construct, so instructions render as children of the function box. SVG / sigma renderers ignore this field — they don't support compound nodes natively.

Independent of ownerElementId: that one links a code construct up to a user-spec Element; this one links a code construct up to its enclosing code construct.