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.debug.DebuggerListener extends java.rmi.Remote, java.util.EventListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: freemarker.debug.DebuggerListener
  super_class: java.lang.Object
{
  public abstract void environmentSuspended(freemarker.debug.EnvironmentSuspendedEvent);
    descriptor: (Lfreemarker/debug/EnvironmentSuspendedEvent;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.rmi.RemoteException
    MethodParameters:
      Name  Flags
      e     
}
SourceFile: "DebuggerListener.java"