https://github.com/javaee/jpa-spec: Java(TM) Persistence API 
public interface javax.persistence.metamodel.MapAttribute<X, K, V> extends javax.persistence.metamodel.PluralAttribute<X, java.util.Map<K, V>, V>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.persistence.metamodel.MapAttribute
  super_class: java.lang.Object
{
  public abstract java.lang.Class<K> getKeyJavaType();
    descriptor: ()Ljava/lang/Class;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/lang/Class<TK;>;

  public abstract javax.persistence.metamodel.Type<K> getKeyType();
    descriptor: ()Ljavax/persistence/metamodel/Type;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljavax/persistence/metamodel/Type<TK;>;
}
Signature: <X:Ljava/lang/Object;K:Ljava/lang/Object;V:Ljava/lang/Object;>Ljava/lang/Object;Ljavax/persistence/metamodel/PluralAttribute<TX;Ljava/util/Map<TK;TV;>;TV;>;
SourceFile: "MapAttribute.java"