https://openjdk.java.net/ 
interface com.sun.tools.jdi.VMListener extends java.util.EventListener
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.tools.jdi.VMListener
  super_class: java.lang.Object
{
  public abstract boolean vmSuspended(com.sun.tools.jdi.VMAction);
    descriptor: (Lcom/sun/tools/jdi/VMAction;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      action  

  public abstract boolean vmNotSuspended(com.sun.tools.jdi.VMAction);
    descriptor: (Lcom/sun/tools/jdi/VMAction;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      action  
}
SourceFile: "VMListener.java"