code: private void allInput(List<FileModel> vertices, GraphRewrite event, ParameterStore store)
      {
          if (StringUtils.isBlank(getInputVariablesName()) && this.filenamePattern == null)
          {
              FileService fileModelService = new FileService(event.getGraphContext());
              for (FileModel fileModel : fileModelService.findAll())
              {
                  vertices.add(fileModel);
              }
          }
      }
docs: Generating the input vertices is quite complex. Therefore there are multiple methods that handles the input vertices
  based on the attribute specified in specific order. This method generates all the vertices if there is no other way how to handle
  the input.