anchor.diff:                                                        KVs)),
       RestApiPrefix = binary_to_list(get_element(<<"rest-api-prefix">>, KVs)),
       DocRoot = decode_docroot(get_element(<<"doc-root">>, KVs)),
  -    ReqHdrFilter = decode_request_header_filter(
  +    ReqHdrFilter = decode_request_headers_filter(
                        get_opt_element(<<"request-headers-filter">>, KVs)),
       case {valid_service(ServiceName),
             find_plugin_by_prefix(RestApiPrefix, Plugins)} of
  
positive.code:                              proxy_strategy = local,
                               rest_api_prefix = "couchBase",
                               doc_root = "",
                               request_headers_filter = {keep, ["Accept",
                                                                "Accept-Encoding",
                                                                "Accept-Language",
                                                                "Cache-Control",
                                                                "Connection",
                                                                "Content-Type",
                                                                "Pragma",
                                                                "Referer"]}}).
  
  -spec find_plugins() -> plugins().
  find_plugins() ->
  
negative.code: -define(TIMEOUT, 60000).
  -define(PART_SIZE, 100000).
  -define(WINDOW_SIZE, 5).
  -define(DEF_REQ_HEADERS_FILTER, {drop, ["content-length",
                                          "transfer-encoding"]}).
  -define(DEF_RESP_HEADERS_FILTER, {drop, ["content-length",
                                           "transfer-encoding",
                                           "www-authenticate"]}).
  -type service_name()   :: atom().
  -type rest_api_prefix():: string().
  -type proxy_strategy() :: local.
  