How to use

taskId

method

in

org.flowable.content.api.ContentItemQuery

public ResultListDataRepresentation getContentItemsForTask(String taskId) {
  permissionService.validateReadPermissionOnTask(SecurityUtils.getCurrentUserObject(), taskId);
  return createResultRepresentation(contentService.createContentItemQuery().taskId(taskId).list());
}

contentItemQuery.taskId(request.getTaskId());