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.reflect.Types$TypeVariableInvocationHandler implements java.lang.reflect.InvocationHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.reflect.Types$TypeVariableInvocationHandler
  super_class: java.lang.Object
{
  private static final com.google.common.collect.ImmutableMap<java.lang.String, java.lang.reflect.Method> typeVariableMethods;
    descriptor: Lcom/google/common/collect/ImmutableMap;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    Signature: Lcom/google/common/collect/ImmutableMap<Ljava/lang/String;Ljava/lang/reflect/Method;>;

  private final com.google.common.reflect.Types$TypeVariableImpl<?> typeVariableImpl;
    descriptor: Lcom/google/common/reflect/Types$TypeVariableImpl;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Lcom/google/common/reflect/Types$TypeVariableImpl<*>;

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=5, args_size=0
         0: .line 358
            invokestatic com.google.common.collect.ImmutableMap.builder:()Lcom/google/common/collect/ImmutableMap$Builder;
            astore 0 /* builder */
        start local 0 // com.google.common.collect.ImmutableMap$Builder builder
         1: .line 359
            ldc Lcom/google/common/reflect/Types$TypeVariableImpl;
            invokevirtual java.lang.Class.getMethods:()[Ljava/lang/reflect/Method;
            dup
            astore 4
            arraylength
            istore 3
            iconst_0
            istore 2
            goto 9
      StackMap locals: com.google.common.collect.ImmutableMap$Builder top int int java.lang.reflect.Method[]
      StackMap stack:
         2: aload 4
            iload 2
            aaload
            astore 1 /* method */
        start local 1 // java.lang.reflect.Method method
         3: .line 360
            aload 1 /* method */
            invokevirtual java.lang.reflect.Method.getDeclaringClass:()Ljava/lang/Class;
            ldc Lcom/google/common/reflect/Types$TypeVariableImpl;
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ifeq 8
         4: .line 362
            aload 1 /* method */
            iconst_1
            invokevirtual java.lang.reflect.Method.setAccessible:(Z)V
         5: .line 363
            goto 7
      StackMap locals: com.google.common.collect.ImmutableMap$Builder java.lang.reflect.Method int int java.lang.reflect.Method[]
      StackMap stack: java.security.AccessControlException
         6: pop
         7: .line 367
      StackMap locals:
      StackMap stack:
            aload 0 /* builder */
            aload 1 /* method */
            invokevirtual java.lang.reflect.Method.getName:()Ljava/lang/String;
            aload 1 /* method */
            invokevirtual com.google.common.collect.ImmutableMap$Builder.put:(Ljava/lang/Object;Ljava/lang/Object;)Lcom/google/common/collect/ImmutableMap$Builder;
            pop
        end local 1 // java.lang.reflect.Method method
         8: .line 359
      StackMap locals: com.google.common.collect.ImmutableMap$Builder top int int java.lang.reflect.Method[]
      StackMap stack:
            iinc 2 1
      StackMap locals:
      StackMap stack:
         9: iload 2
            iload 3
            if_icmplt 2
        10: .line 370
            aload 0 /* builder */
            invokevirtual com.google.common.collect.ImmutableMap$Builder.build:()Lcom/google/common/collect/ImmutableMap;
            putstatic com.google.common.reflect.Types$TypeVariableInvocationHandler.typeVariableMethods:Lcom/google/common/collect/ImmutableMap;
        end local 0 // com.google.common.collect.ImmutableMap$Builder builder
        11: .line 371
            return
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            1   11     0  builder  Lcom/google/common/collect/ImmutableMap$Builder<Ljava/lang/String;Ljava/lang/reflect/Method;>;
            3    8     1   method  Ljava/lang/reflect/Method;
      Exception table:
        from    to  target  type
           4     5       6  Class java.security.AccessControlException

  void <init>(com.google.common.reflect.Types$TypeVariableImpl<?>);
    descriptor: (Lcom/google/common/reflect/Types$TypeVariableImpl;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.reflect.Types$TypeVariableInvocationHandler this
        start local 1 // com.google.common.reflect.Types$TypeVariableImpl typeVariableImpl
         0: .line 375
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 376
            aload 0 /* this */
            aload 1 /* typeVariableImpl */
            putfield com.google.common.reflect.Types$TypeVariableInvocationHandler.typeVariableImpl:Lcom/google/common/reflect/Types$TypeVariableImpl;
         2: .line 377
            return
        end local 1 // com.google.common.reflect.Types$TypeVariableImpl typeVariableImpl
        end local 0 // com.google.common.reflect.Types$TypeVariableInvocationHandler this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    3     0              this  Lcom/google/common/reflect/Types$TypeVariableInvocationHandler;
            0    3     1  typeVariableImpl  Lcom/google/common/reflect/Types$TypeVariableImpl<*>;
    Signature: (Lcom/google/common/reflect/Types$TypeVariableImpl<*>;)V
    MethodParameters:
                  Name  Flags
      typeVariableImpl  

  public java.lang.Object invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[]);
    descriptor: (Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=7, args_size=4
        start local 0 // com.google.common.reflect.Types$TypeVariableInvocationHandler this
        start local 1 // java.lang.Object proxy
        start local 2 // java.lang.reflect.Method method
        start local 3 // java.lang.Object[] args
         0: .line 381
            aload 2 /* method */
            invokevirtual java.lang.reflect.Method.getName:()Ljava/lang/String;
            astore 4 /* methodName */
        start local 4 // java.lang.String methodName
         1: .line 382
            getstatic com.google.common.reflect.Types$TypeVariableInvocationHandler.typeVariableMethods:Lcom/google/common/collect/ImmutableMap;
            aload 4 /* methodName */
            invokevirtual com.google.common.collect.ImmutableMap.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.reflect.Method
            astore 5 /* typeVariableMethod */
        start local 5 // java.lang.reflect.Method typeVariableMethod
         2: .line 383
            aload 5 /* typeVariableMethod */
            ifnonnull 4
         3: .line 384
            new java.lang.UnsupportedOperationException
            dup
            aload 4 /* methodName */
            invokespecial java.lang.UnsupportedOperationException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 387
      StackMap locals: java.lang.String java.lang.reflect.Method
      StackMap stack:
            aload 5 /* typeVariableMethod */
            aload 0 /* this */
            getfield com.google.common.reflect.Types$TypeVariableInvocationHandler.typeVariableImpl:Lcom/google/common/reflect/Types$TypeVariableImpl;
            aload 3 /* args */
            invokevirtual java.lang.reflect.Method.invoke:(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
         5: areturn
         6: .line 388
      StackMap locals:
      StackMap stack: java.lang.reflect.InvocationTargetException
            astore 6 /* e */
        start local 6 // java.lang.reflect.InvocationTargetException e
         7: .line 389
            aload 6 /* e */
            invokevirtual java.lang.reflect.InvocationTargetException.getCause:()Ljava/lang/Throwable;
            athrow
        end local 6 // java.lang.reflect.InvocationTargetException e
        end local 5 // java.lang.reflect.Method typeVariableMethod
        end local 4 // java.lang.String methodName
        end local 3 // java.lang.Object[] args
        end local 2 // java.lang.reflect.Method method
        end local 1 // java.lang.Object proxy
        end local 0 // com.google.common.reflect.Types$TypeVariableInvocationHandler this
      LocalVariableTable:
        Start  End  Slot                Name  Signature
            0    8     0                this  Lcom/google/common/reflect/Types$TypeVariableInvocationHandler;
            0    8     1               proxy  Ljava/lang/Object;
            0    8     2              method  Ljava/lang/reflect/Method;
            0    8     3                args  [Ljava/lang/Object;
            1    8     4          methodName  Ljava/lang/String;
            2    8     5  typeVariableMethod  Ljava/lang/reflect/Method;
            7    8     6                   e  Ljava/lang/reflect/InvocationTargetException;
      Exception table:
        from    to  target  type
           4     5       6  Class java.lang.reflect.InvocationTargetException
    Exceptions:
      throws java.lang.Throwable
    MethodParameters:
        Name  Flags
      proxy   
      method  
      args    
}
SourceFile: "Types.java"
NestHost: com.google.common.reflect.Types
InnerClasses:
  public Builder = com.google.common.collect.ImmutableMap$Builder of com.google.common.collect.ImmutableMap
  private final TypeVariableImpl = com.google.common.reflect.Types$TypeVariableImpl of com.google.common.reflect.Types
  private final TypeVariableInvocationHandler = com.google.common.reflect.Types$TypeVariableInvocationHandler of com.google.common.reflect.Types