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.TemplateDirectiveBody
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: freemarker.template.TemplateDirectiveBody
  super_class: java.lang.Object
{
  public abstract void render(java.io.Writer);
    descriptor: (Ljava/io/Writer;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws freemarker.template.TemplateException, java.io.IOException
    MethodParameters:
      Name  Flags
      out   
}
SourceFile: "TemplateDirectiveBody.java"