https://openjdk.java.net/ 
public interface javax.xml.crypto.KeySelectorResult
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.xml.crypto.KeySelectorResult
  super_class: java.lang.Object
{
  public abstract java.security.Key getKey();
    descriptor: ()Ljava/security/Key;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "KeySelectorResult.java"