java/fury-core/src/main/java/org/apache/fury/serializer/collection/UnmodifiableSerializers.java [58:77]:
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    static {
      // UnmodifiableList/Set/Etc.. extends UnmodifiableCollection
      String clsName = "java.util.Collections$UnmodifiableCollection";
      try {
        SOURCE_COLLECTION_FIELD_OFFSET =
            Platform.UNSAFE.objectFieldOffset(Class.forName(clsName).getDeclaredField("c"));
      } catch (Exception e) {
        LOG.info("Could not access source collection field in {}", clsName);
        throw new RuntimeException(e);
      }
      clsName = "java.util.Collections$UnmodifiableMap";
      try {
        // UnmodifiableSortedMap/UnmodifiableNavigableMap extends UnmodifiableMap
        SOURCE_MAP_FIELD_OFFSET =
            Platform.UNSAFE.objectFieldOffset(Class.forName(clsName).getDeclaredField("m"));
      } catch (Exception e) {
        LOG.info("Could not access source map field in {}", clsName);
        throw new RuntimeException(e);
      }
    }
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java/fury-core/src/main/java/org/apache/fury/serializer/collection/SynchronizedSerializers.java [58:75]:
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    static {
      String clsName = "java.util.Collections$SynchronizedCollection";
      try {
        SOURCE_COLLECTION_FIELD_OFFSET =
            Platform.UNSAFE.objectFieldOffset(Class.forName(clsName).getDeclaredField("c"));
      } catch (Exception e) {
        LOG.info("Could not access source collection field in {}", clsName);
        throw new RuntimeException(e);
      }
      clsName = "java.util.Collections$SynchronizedMap";
      try {
        SOURCE_MAP_FIELD_OFFSET =
            Platform.UNSAFE.objectFieldOffset(Class.forName(clsName).getDeclaredField("m"));
      } catch (Exception e) {
        LOG.info("Could not access source map field in {}", clsName);
        throw new RuntimeException(e);
      }
    }
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