anchor.diff:      ParId :: gri:entity_id()
   } | {space_not_supported_by, ProviderId :: binary()}
   | {view_not_exists_on, ProviderId :: binary()}
  -| transfer_already_ended | transfer_not_ended | storage_in_use.
  +| transfer_already_ended | transfer_not_ended
  +| storage_in_use.
   
   -type errno() :: ?OK | ?E2BIG | ?EACCES | ?EADDRINUSE | ?EADDRNOTAVAIL
   | ?EAFNOSUPPORT | ?EAGAIN | ?EALREADY | ?EBADF | ?EBADMSG | ?EBUSY
  
positive.code: 
  from_json(#{<<"id">> := <<"storageInUse">>}) ->
      ?ERROR_STORAGE_IN_USE;
  %%--------------------------------------------------------------------
  %% Unknown / unexpected error
  %%--------------------------------------------------------------------
  
negative.code: };
  to_json(?ERROR_STORAGE_IN_USE) -> #{
      <<"id">> => <<"storageInUse">>,
      <<"description">> => <<"Specified storage supports a space.">>
  };
  
  %%--------------------------------------------------------------------
  