https://freemarker.apache.org/: FreeMarker is a "template engine"; a generic tool to generate text output based on templates. (Apache Software Foundation) 
public interface freemarker.template.TemplateNodeModelEx extends freemarker.template.TemplateNodeModel
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: freemarker.template.TemplateNodeModelEx
  super_class: java.lang.Object
{
  public abstract freemarker.template.TemplateNodeModelEx getPreviousSibling();
    descriptor: ()Lfreemarker/template/TemplateNodeModelEx;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws freemarker.template.TemplateModelException

  public abstract freemarker.template.TemplateNodeModelEx getNextSibling();
    descriptor: ()Lfreemarker/template/TemplateNodeModelEx;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws freemarker.template.TemplateModelException
}
SourceFile: "TemplateNodeModelEx.java"