https://openjdk.java.net/ 
public interface jdk.internal.vm.compiler.collections.UnmodifiableMapCursor<K, V>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: jdk.internal.vm.compiler.collections.UnmodifiableMapCursor
  super_class: java.lang.Object
{
  public abstract boolean advance();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract K getKey();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()TK;

  public abstract V getValue();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()TV;
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "UnmodifiableMapCursor.java"