https://source.android.com/ 
class android.hardware.camera2.legacy.RequestHandlerThread$1 implements android.os.MessageQueue$IdleHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: android.hardware.camera2.legacy.RequestHandlerThread$1
  super_class: java.lang.Object
{
  final android.hardware.camera2.legacy.RequestHandlerThread this$0;
    descriptor: Landroid/hardware/camera2/legacy/RequestHandlerThread;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(android.hardware.camera2.legacy.RequestHandlerThread);
    descriptor: (Landroid/hardware/camera2/legacy/RequestHandlerThread;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // android.hardware.camera2.legacy.RequestHandlerThread$1 this
         0: .line 88
            aload 0 /* this */
            aload 1
            putfield android.hardware.camera2.legacy.RequestHandlerThread$1.this$0:Landroid/hardware/camera2/legacy/RequestHandlerThread;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // android.hardware.camera2.legacy.RequestHandlerThread$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Landroid/hardware/camera2/legacy/RequestHandlerThread$1;
    MethodParameters:
        Name  Flags
      this$0  final

  public boolean queueIdle();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // android.hardware.camera2.legacy.RequestHandlerThread$1 this
         0: .line 91
            aload 0 /* this */
            getfield android.hardware.camera2.legacy.RequestHandlerThread$1.this$0:Landroid/hardware/camera2/legacy/RequestHandlerThread;
            getfield android.hardware.camera2.legacy.RequestHandlerThread.mIdle:Landroid/os/ConditionVariable;
            invokevirtual android.os.ConditionVariable.open:()V
         1: .line 92
            iconst_0
            ireturn
        end local 0 // android.hardware.camera2.legacy.RequestHandlerThread$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Landroid/hardware/camera2/legacy/RequestHandlerThread$1;
}
SourceFile: "RequestHandlerThread.java"
EnclosingMethod: android.hardware.camera2.legacy.RequestHandlerThread
NestHost: android.hardware.camera2.legacy.RequestHandlerThread
InnerClasses:
  android.hardware.camera2.legacy.RequestHandlerThread$1
  public abstract IdleHandler = android.os.MessageQueue$IdleHandler of android.os.MessageQueue