Remove unnecessary keySet() invocation (#3989)

hduelme · web-flow · commit 06e27d575365 · 2026-02-02T11:56:16.000+01:00
diff --git a/processor/src/main/java/org/mapstruct/ap/internal/model/NestedTargetPropertyMappingHolder.java b/processor/src/main/java/org/mapstruct/ap/internal/model/NestedTargetPropertyMappingHolder.java
@@ -151,8 +151,7 @@ public NestedTargetPropertyMappingHolder build() {
                     entryByTP.getValue(),
                     groupedByTP.singleTargetReferences.get( targetProperty )
                 );
-                boolean multipleSourceParametersForTP =
-                    groupedBySourceParam.groupedBySourceParameter.keySet().size() > 1;
+                boolean multipleSourceParametersForTP = groupedBySourceParam.groupedBySourceParameter.size() > 1;
 
                 // All not processed mappings that should have been applied to all are part of the unprocessed
                 // defined targets
