anchor.diff:  -spec glusterfs_model() -> maps:map().
   glusterfs_model() ->
       #{
  +        %% The type of storage.
  +        type => {equal, <<"glusterfs">>},
           %% The Id of storage.
           id => {string, optional},
           %% The name of storage.
  
positive.code: -spec cephrados_model() -> maps:map().
  cephrados_model() ->
      #{
          %% The Id of storage.
          id => {string, optional},
          %% The name of storage.
  
negative.code:         %% LUMA API Key, must be identical with API Key in external LUMA
          %% service.
          lumaApiKey => {string, optional},
          %% The username of the Ceph cluster administrator.
          username => string,
          %% The admin key to access the Ceph cluster.
  