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.util.concurrent.TimeoutFuture$TimeoutFutureException extends java.util.concurrent.TimeoutException
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.util.concurrent.TimeoutFuture$TimeoutFutureException
  super_class: java.util.concurrent.TimeoutException
{
  private void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.util.concurrent.TimeoutFuture$TimeoutFutureException this
        start local 1 // java.lang.String message
         0: .line 144
            aload 0 /* this */
            aload 1 /* message */
            invokespecial java.util.concurrent.TimeoutException.<init>:(Ljava/lang/String;)V
         1: .line 145
            return
        end local 1 // java.lang.String message
        end local 0 // com.google.common.util.concurrent.TimeoutFuture$TimeoutFutureException this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    2     0     this  Lcom/google/common/util/concurrent/TimeoutFuture$TimeoutFutureException;
            0    2     1  message  Ljava/lang/String;
    MethodParameters:
         Name  Flags
      message  

  public synchronized java.lang.Throwable fillInStackTrace();
    descriptor: ()Ljava/lang/Throwable;
    flags: (0x0021) ACC_PUBLIC, ACC_SYNCHRONIZED
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.TimeoutFuture$TimeoutFutureException this
         0: .line 149
            aload 0 /* this */
            iconst_0
            anewarray java.lang.StackTraceElement
            invokevirtual com.google.common.util.concurrent.TimeoutFuture$TimeoutFutureException.setStackTrace:([Ljava/lang/StackTraceElement;)V
         1: .line 150
            aload 0 /* this */
            areturn
        end local 0 // com.google.common.util.concurrent.TimeoutFuture$TimeoutFutureException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/google/common/util/concurrent/TimeoutFuture$TimeoutFutureException;
}
SourceFile: "TimeoutFuture.java"
NestHost: com.google.common.util.concurrent.TimeoutFuture
InnerClasses:
  private final TimeoutFutureException = com.google.common.util.concurrent.TimeoutFuture$TimeoutFutureException of com.google.common.util.concurrent.TimeoutFuture