use map to avoid indentation

Author: t-ober

src/main/java/edu/ie3/datamodel/io/sink/CsvFileSink.java

@@ -324,19 +324,19 @@ private <C extends UniqueEntity> void write(C entity) {
     LinkedHashMap<String, String> entityFieldData;
     try {
       entityFieldData =
-          csvEntityFieldData(
               processorProvider
-                  .handleEntity(entity)
-                  .orElseThrow(
-                      () ->
-                          new SinkException(
-                              "Cannot persist entity of type '"
-                                  + entity.getClass().getSimpleName()
-                                  + "'. This sink can only process the following entities: ["
-                                  + processorProvider.getRegisteredClasses().stream()
-                                      .map(Class::getSimpleName)
-                                      .collect(Collectors.joining(","))
-                                  + "]")));
+                .handleEntity(entity)
+                .map(this::csvEntityFieldData)
+                .orElseThrow(
+                    () ->
+                        new SinkException(
+                            "Cannot persist entity of type '"
+                                + entity.getClass().getSimpleName()
+                                + "'. This sink can only process the following entities: ["
+                                + processorProvider.getRegisteredClasses().stream()
+                                    .map(Class::getSimpleName)
+                                    .collect(Collectors.joining(","))
+                                + "]"));
 
       String[] headerElements = processorProvider.getHeaderElements(entity.getClass());
       BufferedCsvWriter writer =