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.Runnables$1 implements java.lang.Runnable
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.util.concurrent.Runnables$1
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.Runnables$1 this
         0: .line 30
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.google.common.util.concurrent.Runnables$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/util/concurrent/Runnables$1;

  public void run();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.Runnables$1 this
         0: .line 32
            return
        end local 0 // com.google.common.util.concurrent.Runnables$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/util/concurrent/Runnables$1;
}
SourceFile: "Runnables.java"
EnclosingMethod: com.google.common.util.concurrent.Runnables
NestHost: com.google.common.util.concurrent.Runnables
InnerClasses:
  com.google.common.util.concurrent.Runnables$1