fix(unit): Add return type to SiNamedUnit._withPrefix

nebkat · nebkat · commit 80f43be6be2d · 2025-10-01T00:48:26.000+01:00
diff --git a/lib/src/core/unit.dart b/lib/src/core/unit.dart
@@ -231,7 +231,7 @@ class SiNamedUnit extends NamedUnit {
     super.spaceBeforeSymbol = true,
   });
 
-  _withPrefix(
+  NamedUnit _withPrefix(
     String symbolPrefix,
     String namePrefix,
     double scale,
