https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
class com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder
  super_class: java.lang.Object
{
  static final java.lang.String UNSAFE_COMPARATOR_NAME;
    descriptor: Ljava/lang/String;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  static final java.util.Comparator<byte[]> BEST_COMPARATOR;
    descriptor: Ljava/util/Comparator;
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    Signature: Ljava/util/Comparator<[B>;

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 289
            new java.lang.StringBuilder
            dup
            ldc Lcom/google/common/primitives/UnsignedBytes$LexicographicalComparatorHolder;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc "$UnsafeComparator"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         1: .line 288
            putstatic com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder.UNSAFE_COMPARATOR_NAME:Ljava/lang/String;
         2: .line 291
            invokestatic com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder.getBestComparator:()Ljava/util/Comparator;
            putstatic com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder.BEST_COMPARATOR:Ljava/util/Comparator;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder this
         0: .line 287
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/primitives/UnsignedBytes$LexicographicalComparatorHolder;

  static java.util.Comparator<byte[]> getBestComparator();
    descriptor: ()Ljava/util/Comparator;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=2, args_size=0
         0: .line 438
            getstatic com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder.UNSAFE_COMPARATOR_NAME:Ljava/lang/String;
            invokestatic java.lang.Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
            astore 0 /* theClass */
        start local 0 // java.lang.Class theClass
         1: .line 442
            aload 0 /* theClass */
            invokevirtual java.lang.Class.getEnumConstants:()[Ljava/lang/Object;
            iconst_0
            aaload
            checkcast java.util.Comparator
            astore 1 /* comparator */
        start local 1 // java.util.Comparator comparator
         2: .line 443
            aload 1 /* comparator */
         3: areturn
        end local 1 // java.util.Comparator comparator
        end local 0 // java.lang.Class theClass
         4: .line 444
      StackMap locals:
      StackMap stack: java.lang.Throwable
            pop
         5: .line 445
            invokestatic com.google.common.primitives.UnsignedBytes.lexicographicalComparatorJavaImpl:()Ljava/util/Comparator;
            areturn
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            1    4     0    theClass  Ljava/lang/Class<*>;
            2    4     1  comparator  Ljava/util/Comparator<[B>;
      Exception table:
        from    to  target  type
           0     3       4  Class java.lang.Throwable
    Signature: ()Ljava/util/Comparator<[B>;
}
SourceFile: "UnsignedBytes.java"
NestHost: com.google.common.primitives.UnsignedBytes
InnerClasses:
  LexicographicalComparatorHolder = com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder of com.google.common.primitives.UnsignedBytes
  final PureJavaComparator = com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder$PureJavaComparator of com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder
  final UnsafeComparator = com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder$UnsafeComparator of com.google.common.primitives.UnsignedBytes$LexicographicalComparatorHolder
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.VisibleForTesting()