core/src/main/java/com/twitter/elephantbird/util/Protobufs.java
public static List<String> getMessageFieldNames(Class<? extends Message> protoClass, Map<String, String> fieldNameTranslations) {
    return getMessageFieldNames(getMessageDescriptor(protoClass), fieldNameTranslations);
  }
public static List<String> getMessageFieldNames(Class<? extends Message> protoClass, Map<String, String> fieldNameTranslations) {
    return getMessageFieldNames(getMessageDescriptor(protoClass), fieldNameTranslations);
  }
public static List < String > getMessageFieldNames ( Class < ? extends Message > protoClass , Map < String , String > fieldNameTranslations ) { return getMessageFieldNames ( getMessageDescriptor ( protoClass ) , fieldNameTranslations ) ; }
{ "a" => "A", "c" => "IGNORE" }, then you'll end up with A, b
{ a = > A c = > IGNORE } then you ll end up with A b