https://openjdk.java.net/ 
public interface java.beans.beancontext.BeanContextContainerProxy
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: java.beans.beancontext.BeanContextContainerProxy
  super_class: java.lang.Object
{
  public abstract java.awt.Container getContainer();
    descriptor: ()Ljava/awt/Container;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "BeanContextContainerProxy.java"