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.util.concurrent.Striped$PaddedLock extends java.util.concurrent.locks.ReentrantLock
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.util.concurrent.Striped$PaddedLock
  super_class: java.util.concurrent.locks.ReentrantLock
{
  long unused1;
    descriptor: J
    flags: (0x0000) 

  long unused2;
    descriptor: J
    flags: (0x0000) 

  long unused3;
    descriptor: J
    flags: (0x0000) 

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.Striped$PaddedLock this
         0: .line 571
            aload 0 /* this */
            iconst_0
            invokespecial java.util.concurrent.locks.ReentrantLock.<init>:(Z)V
         1: .line 572
            return
        end local 0 // com.google.common.util.concurrent.Striped$PaddedLock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/google/common/util/concurrent/Striped$PaddedLock;
}
SourceFile: "Striped.java"
NestHost: com.google.common.util.concurrent.Striped
InnerClasses:
  private PaddedLock = com.google.common.util.concurrent.Striped$PaddedLock of com.google.common.util.concurrent.Striped