https://openjdk.java.net/ 
public interface javax.lang.model.type.WildcardType extends javax.lang.model.type.TypeMirror
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.lang.model.type.WildcardType
  super_class: java.lang.Object
{
  public abstract javax.lang.model.type.TypeMirror getExtendsBound();
    descriptor: ()Ljavax/lang/model/type/TypeMirror;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract javax.lang.model.type.TypeMirror getSuperBound();
    descriptor: ()Ljavax/lang/model/type/TypeMirror;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "WildcardType.java"