anchor.diff:    change_since/1,
     change_since_many/1,
     change_since_include_doc/1,
  -  revdiff/1,
  +  revsdiff/1,
     get_revisions/1,
     put_rev/1,
     change_deleted/1
  
positive.code:     change_since,
      change_since_many,
      change_since_include_doc,
      revdiff,
      put_rev,
      change_deleted
    ].
  
negative.code:   [] = barrel_local:changes_since(<<"testdb">>, 21, Fun, []),
    ok.
  
  revsdiff(_Config) ->
    Doc = #{ <<"id">> => <<"revsdiff">>, <<"v">> => 1},
    {ok, <<"revsdiff">>, RevId} = barrel_local:put(<<"testdb">>, Doc, []),
    Doc2 = Doc#{<<"_rev">> => RevId, <<"v">> => 2},
    {ok, <<"revsdiff">>, _RevId3} = barrel_local:put(<<"testdb">>, Doc2, []),
    {ok, [<<"1-missing">>], []} = barrel_local:revsdiff(<<"testdb">>, <<"revsdiff">>, [<<"1-missing">>]),
    ok.