[xgb] Fixes missing anonymous classes

[frankfliu]

Change-Id: I79645d18cd26aba2e8e4dff482b7efebbcecc096

Description

Brief description of what this PR is about

• If this change is a backward incompatible change, why must this change be made?
• Interesting edge cases to note here

[codecov-commenter]

Codecov Report

Merging #1572 (c03248f) into master (bb5073f) will decrease coverage by 1.25%.
The diff coverage is 58.40%.

@@             Coverage Diff              @@
##             master    #1572      +/-   ##
============================================
- Coverage     72.08%   70.83%   -1.26%     
- Complexity     5126     5394     +268     
============================================
  Files           473      503      +30     
  Lines         21970    23582    +1612     
  Branches       2351     2561     +210     
============================================
+ Hits          15838    16705     +867     
- Misses         4925     5598     +673     
- Partials       1207     1279      +72     

Impacted Files	Coverage Δ
api/src/main/java/ai/djl/modality/cv/Image.java	69.23% <ø> (-4.11%)	⬇️
...i/djl/modality/cv/translator/BigGANTranslator.java	21.42% <ø> (-5.24%)	⬇️
...odality/cv/translator/BigGANTranslatorFactory.java	33.33% <0.00%> (+8.33%)	⬆️
...nslator/InstanceSegmentationTranslatorFactory.java	14.28% <0.00%> (-3.90%)	⬇️
.../modality/cv/translator/YoloTranslatorFactory.java	8.33% <0.00%> (-1.67%)	⬇️
...i/djl/modality/cv/translator/YoloV5Translator.java	5.69% <0.00%> (ø)
...odality/cv/translator/YoloV5TranslatorFactory.java	8.33% <0.00%> (-1.67%)	⬇️
...pi/src/main/java/ai/djl/ndarray/BytesSupplier.java	54.54% <0.00%> (-12.13%)	⬇️
...ain/java/ai/djl/ndarray/index/dim/NDIndexPick.java	100.00% <ø> (ø)
api/src/main/java/ai/djl/nn/Blocks.java	75.00% <0.00%> (-25.00%)	⬇️
... and 229 more

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