https://openjdk.java.net/ 
public interface com.sun.xml.internal.ws.policy.spi.PrefixMapper
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.xml.internal.ws.policy.spi.PrefixMapper
  super_class: java.lang.Object
{
  public abstract java.util.Map<java.lang.String, java.lang.String> getPrefixMap();
    descriptor: ()Ljava/util/Map;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;
}
SourceFile: "PrefixMapper.java"