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. 
final class com.google.common.cache.CacheBuilder$OneWeigher extends java.lang.Enum<com.google.common.cache.CacheBuilder$OneWeigher> implements com.google.common.cache.Weigher<java.lang.Object, java.lang.Object>
  minor version: 0
  major version: 59
  flags: flags: (0x4030) ACC_FINAL, ACC_SUPER, ACC_ANNOTATION
  this_class: com.google.common.cache.CacheBuilder$OneWeigher
  super_class: java.lang.Enum
{
  public static final com.google.common.cache.CacheBuilder$OneWeigher INSTANCE;
    descriptor: Lcom/google/common/cache/CacheBuilder$OneWeigher;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION
    Signature: Lcom/google/common/cache/CacheBuilder$OneWeigher;

  private static final com.google.common.cache.CacheBuilder$OneWeigher[] ENUM$VALUES;
    descriptor: [Lcom/google/common/cache/CacheBuilder$OneWeigher;
    flags: (0x101a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=0, args_size=0
         0: .line 204
            new com.google.common.cache.CacheBuilder$OneWeigher
            dup
            ldc "INSTANCE"
            iconst_0
            invokespecial com.google.common.cache.CacheBuilder$OneWeigher.<init>:(Ljava/lang/String;I)V
            putstatic com.google.common.cache.CacheBuilder$OneWeigher.INSTANCE:Lcom/google/common/cache/CacheBuilder$OneWeigher;
         1: .line 203
            iconst_1
            anewarray com.google.common.cache.CacheBuilder$OneWeigher
            dup
            iconst_0
            getstatic com.google.common.cache.CacheBuilder$OneWeigher.INSTANCE:Lcom/google/common/cache/CacheBuilder$OneWeigher;
            aastore
            putstatic com.google.common.cache.CacheBuilder$OneWeigher.ENUM$VALUES:[Lcom/google/common/cache/CacheBuilder$OneWeigher;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>(java.lang.String, int);
    descriptor: (Ljava/lang/String;I)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.google.common.cache.CacheBuilder$OneWeigher this
         0: .line 203
            aload 0 /* this */
            aload 1
            iload 2
            invokespecial java.lang.Enum.<init>:(Ljava/lang/String;I)V
            return
        end local 0 // com.google.common.cache.CacheBuilder$OneWeigher this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/cache/CacheBuilder$OneWeigher;
    MethodParameters:
               Name  Flags
      $enum$name     
      $enum$ordinal  

  public int weigh(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=3, args_size=3
        start local 0 // com.google.common.cache.CacheBuilder$OneWeigher this
        start local 1 // java.lang.Object key
        start local 2 // java.lang.Object value
         0: .line 208
            iconst_1
            ireturn
        end local 2 // java.lang.Object value
        end local 1 // java.lang.Object key
        end local 0 // com.google.common.cache.CacheBuilder$OneWeigher this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/cache/CacheBuilder$OneWeigher;
            0    1     1    key  Ljava/lang/Object;
            0    1     2  value  Ljava/lang/Object;
    MethodParameters:
       Name  Flags
      key    
      value  

  public static com.google.common.cache.CacheBuilder$OneWeigher[] values();
    descriptor: ()[Lcom/google/common/cache/CacheBuilder$OneWeigher;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=3, args_size=0
         0: .line 1
            getstatic com.google.common.cache.CacheBuilder$OneWeigher.ENUM$VALUES:[Lcom/google/common/cache/CacheBuilder$OneWeigher;
            dup
            astore 0
            iconst_0
            aload 0
            arraylength
            dup
            istore 1
            anewarray com.google.common.cache.CacheBuilder$OneWeigher
            dup
            astore 2
            iconst_0
            iload 1
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
            aload 2
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static com.google.common.cache.CacheBuilder$OneWeigher valueOf(java.lang.String);
    descriptor: (Ljava/lang/String;)Lcom/google/common/cache/CacheBuilder$OneWeigher;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
         0: .line 1
            ldc Lcom/google/common/cache/CacheBuilder$OneWeigher;
            aload 0
            invokestatic java.lang.Enum.valueOf:(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;
            checkcast com.google.common.cache.CacheBuilder$OneWeigher
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    MethodParameters:
      Name  Flags
      name  
}
Signature: Ljava/lang/Enum<Lcom/google/common/cache/CacheBuilder$OneWeigher;>;Lcom/google/common/cache/Weigher<Ljava/lang/Object;Ljava/lang/Object;>;
SourceFile: "CacheBuilder.java"
NestHost: com.google.common.cache.CacheBuilder
InnerClasses:
  final OneWeigher = com.google.common.cache.CacheBuilder$OneWeigher of com.google.common.cache.CacheBuilder