https://openjdk.java.net/ 
public interface sun.swing.SwingAccessor$UIDefaultsAccessor
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.swing.SwingAccessor$UIDefaultsAccessor
  super_class: java.lang.Object
{
  public abstract void addInternalBundle(javax.swing.UIDefaults, java.lang.String);
    descriptor: (Ljavax/swing/UIDefaults;Ljava/lang/String;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
            Name  Flags
      uiDefaults  
      bundleName  
}
SourceFile: "SwingAccessor.java"
NestHost: sun.swing.SwingAccessor
InnerClasses:
  public abstract UIDefaultsAccessor = sun.swing.SwingAccessor$UIDefaultsAccessor of sun.swing.SwingAccessor