{ "present":
  { "type": ["end-to-end", "with serve"]
  , "name": ["present"]
  , "test": ["present.sh"]
  , "deps": [["", "mr-tool-under-test"], ["", "tool-under-test"]]
  , "repos": [["end-to-end/serve-service", "serve-tree (data)"]]
  }
, "absent":
  { "type": ["end-to-end", "with serve"]
  , "name": ["absent"]
  , "test": ["absent.sh"]
  , "deps": [["", "mr-tool-under-test"], ["", "tool-under-test"]]
  , "repos": [["end-to-end/serve-service", "serve-tree (data)"]]
  }
, "TESTS":
  { "type": ["@", "rules", "test", "suite"]
  , "stage": ["serve-git-tree-root"]
  , "deps": ["absent", "present"]
  }
}