     for c of app.component
         for i of app.component[c]
             item = app.component[c][i]
-            item.update() if item.spec.isSink is "true"
+            item.update() # if item.isSink is "true"
 
 class App
 

    for type of app.component
        for i of app.component[type]
            item = app.component[type][i]
            if item.spec.isSource is "true"
                item.update()

    for sym of app.sheet
        app.sheet[sym].toLocal()
        
    console.log "######## user-code ########"

    # ??? eval app.file["user.coffee"] ???


        @sheet = {}
        specs = JSON.parse(@file["sheet.json"])
        for spec in specs
            @sheet[spec.id] = new Sheet spec

        # components

