https://openjdk.java.net/ 
public interface java.awt.peer.ContainerPeer extends java.awt.peer.ComponentPeer
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: java.awt.peer.ContainerPeer
  super_class: java.lang.Object
{
  public abstract java.awt.Insets getInsets();
    descriptor: ()Ljava/awt/Insets;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void beginValidate();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void endValidate();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void beginLayout();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void endLayout();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "ContainerPeer.java"