Duplicate builder tests with setter prefix

test/transform/resource/before/BuilderSingularToBuilderWithNullWithSetterPrefix.java

@@ -0,0 +1,10 @@
+import lombok.Singular;
+
+@lombok.Builder(toBuilder = true, setterPrefix = "with")
+class BuilderSingularToBuilderWithNull {
+	@Singular private java.util.List<String> elems;
+	
+	public static void test() {
+		new BuilderSingularToBuilderWithNull(null).toBuilder();
+	}
+}