https://openjdk.java.net/ 
interface jdk.incubator.jpackage.internal.PlatformPackage
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: jdk.incubator.jpackage.internal.PlatformPackage
  super_class: java.lang.Object
{
  public abstract java.lang.String name();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.nio.file.Path sourceRoot();
    descriptor: ()Ljava/nio/file/Path;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract jdk.incubator.jpackage.internal.ApplicationLayout sourceApplicationLayout();
    descriptor: ()Ljdk/incubator/jpackage/internal/ApplicationLayout;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract jdk.incubator.jpackage.internal.ApplicationLayout installedApplicationLayout();
    descriptor: ()Ljdk/incubator/jpackage/internal/ApplicationLayout;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "PlatformPackage.java"