keep simplifying

packages/node_modules/pouchdb-adapter-utils/src/processDocs.js

diff --git a/packages/node_modules/pouchdb-adapter-utils/src/processDocs.js b/packages/node_modules/pouchdb-adapter-utils/src/processDocs.js
index 3350e0a..ed20124 100644
--- a/packages/node_modules/pouchdb-adapter-utils/src/processDocs.js
+++ b/packages/node_modules/pouchdb-adapter-utils/src/processDocs.js
@@ -6,7 +6,6 @@
   merge,
   winningRev as calculateWinningRev
 } from 'pouchdb-merge';
-import { Map } from 'pouchdb-collections';
 
 function rootIsMissing(docInfo) {
   return docInfo.metadata.rev_tree[0].ids[1].status === 'missing';
@@ -90,7 +89,7 @@
   revLimit = revLimit || 1000;
   var newEdits = opts.new_edits;
   var wasDelete = 'was_delete' in opts;
-  var idsToDocs = new Map();
+  var idsToDocs = {};
   var docsDone = 0;
   var docsToDo = docInfos.length;
 
@@ -107,27 +106,33 @@
       api[fun](currentDocInfo, {ctx: tx}, afterLocalPutOrRemove(i, results, checkAllDocsDone));
     } else {
       var currentDocId = currentDocInfo.metadata.id;
-      if (idsToDocs.has(currentDocId)) {
+      var currentKey = '$' + currentDocId;
+      var currentValue = idsToDocs[currentKey];
+      if (currentValue) {
         docsToDo--; // duplicate
-        idsToDocs.get(currentDocId).push([currentDocInfo, i]);
+        currentValue.push([currentDocInfo, i]);
       } else {
-        idsToDocs.set(currentDocId, [[currentDocInfo, i]]);
+        idsToDocs[currentKey] = [[currentDocInfo, i]];
       }
     }
   }
 
   // in the case of new_edits, the user can provide multiple docs
   // with the same id. these need to be processed sequentially
-  idsToDocs.forEach(function (docs, id) {
-    if (docs.length === 1) { // fast case
-      var thisDoc = docs[0];
-      mergeOrUpdateDoc(id, fetchedDocs, thisDoc[0], results, thisDoc[1], revLimit, newEdits,
-        wasDelete, writeDoc, checkAllDocsDone);
-    } else { // slow case
-      processsMultipleDocsWithSameId(id, docs, fetchedDocs, results, revLimit, newEdits,
-        wasDelete, writeDoc, checkAllDocsDone);
+  for (var thisKey in idsToDocs) {
+    if (idsToDocs.hasOwnProperty(thisKey)) {
+      var id = thisKey.substring(1); // cut off initial '$'
+      var docs = idsToDocs[thisKey];
+      if (docs.length === 1) { // fast case
+        var thisDoc = docs[0];
+        mergeOrUpdateDoc(id, fetchedDocs, thisDoc[0], results, thisDoc[1], revLimit, newEdits,
+          wasDelete, writeDoc, checkAllDocsDone);
+      } else { // slow case
+        processsMultipleDocsWithSameId(id, docs, fetchedDocs, results, revLimit, newEdits,
+          wasDelete, writeDoc, checkAllDocsDone);
+      }
     }
-  });
+  }
 }
 
 export default processDocs;