backend property
Backend is the leg that contributed this match: "index" (lexical), "vector" (semantic) or "code" (the org's repositories). It is the same name that leg reports itself under in Fusion.Backends, so a hit can be traced to a status.
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? backend;