Use Map.forEach instead of manual Map.Entry iteration wherever possible SPR-16646

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/MatrixVariableMapMethodArgumentResolver.java

@@ -90,11 +90,11 @@ public class MatrixVariableMapMethodArgumentResolver extends HandlerMethodArgume
 		}
 		else {
 			for (MultiValueMap<String, String> vars : matrixVariables.values()) {
-				for (String name : vars.keySet()) {
-					for (String value : vars.get(name)) {
+				vars.forEach((name, values) -> {
+					for (String value : values) {
 						map.add(name, value);
 					}
-				}
+				});
 			}
 		}