code: @Override
      public boolean applyAction(Model m) {
          Mapping map = m.getMapping();
          if (map.isOnline(node) &&
                  map.isRunning(vm) &&
                  map.getVMLocation(vm).equals(node)) {
              map.addReadyVM(vm);
              return true;
          }
          return false;
      }
docs: Apply the action by removing the virtual machine from the model.
  
  @param m the model to alter
  @return {@code true}