-    
-    var dirty = {
-        sourceEditor: false,
-        documentCanvas: false,
-        metadataEditor: false,
-    };
-    
-    var synchronizeTab = function(slug) {
-        function tabIsDirty(slug) {
-            if(slug === 'editor' && (dirty.documentCanvas || dirty.metadataEditor))
-                return true;
-            if(slug === 'sourceEditor' && dirty.sourceEditor)
-                return true;
-            return false;
-        }
-    
-        if(tabIsDirty(slug)) {
-            var reason, doc;
-            if(slug === 'sourceEditor') {
-                doc = sandbox.getModule('sourceEditor').getDocument();
-                reason = 'source_edit';
-                dirty.sourceEditor = false;
-            }
-            if(slug === 'editor') {
-                doc = dirty.documentCanvas ? sandbox.getModule('documentCanvas').getDocument() : sandbox.getModule('data').getDocument();
-                if(dirty.metadataEditor) {
-                    doc = sandbox.getModule('metadataEditor').attachMetadata(doc);
-                }
-                reason = 'edit';
-                dirty.documentCanvas = dirty.metadataEditor = false;
-            }
-            sandbox.getModule('data').commitDocument(doc, reason);
-        }
-    };
-