from property
From is the id of the node the edge starts at: the child page for a parent edge, the page holding the wikilink for a link edge, the kb-source for a provenance edge. Always one of Nodes.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? from;