Missing algo

fetch.bs

@@ -3738,14 +3738,16 @@ optional algorithm
 an optional algorithm <dfn export for=fetch id=process-response><var>processResponse</var></dfn>,
 an optional algorithm
 <dfn export for=fetch id=process-response-end-of-body oldids=process-response-end-of-file><var>processResponseEndOfBody</var></dfn>,
-an optional algorithm <dfn export for=fetch><var>processResponseDone</var></dfn>, and an optional
+an optional algorithm <dfn export for=fetch><var>processResponseDone</var></dfn>, an optional
+algorithm <dfn export for=fetch><var>processFetchStart</var></dfn>, and an optional
 boolean <dfn export for=fetch><var>useParallelQueue</var></dfn> (default false), run the steps
 below. If given, <var>processRequestBodyChunkLength</var> must be an algorithm accepting an integer
 representing the number of bytes transmitted. If given, <var>processRequestEndOfBody</var> must be
 an algorithm accepting no arguments. If given, <var>processResponse</var> must be an algorithm
 accepting a <a for=/>response</a>. If given, <var>processResponseEndOfBody</var> must be an
 algorithm accepting a <a for=/>response</a> and null, failure, or a <a for=/>byte sequence</a>. If
-given, <var>processResponseDone</var> must be an algorithm accepting a <a for=/>response</a>.
+given, <var>processResponseDone</var> must be an algorithm accepting a <a for=/>response</a>. If
+given, <var>processFetchStart</var> must be an algorithm accepting a <a for=/>fetch controller</a>.
 
 <p>The user agent may be asked to
 <dfn export for=fetch id=concept-fetch-suspend>suspend</dfn> the ongoing fetch.