Constant META_GITLAB_DIND_SERVICE 

pub const META_GITLAB_DIND_SERVICE: &str = "gitlab_dind_service";

Marks a Step (GitLab job) that declares one or more services: entries matching docker:*-dind or docker:dind. Combined with secret-bearing HasAccessTo edges it indicates a runtime sandbox-escape primitive — any inline build step can docker run -v /:/host from inside dind.