anchor.diff:              if index >= 0 then
                 //... we found the property
                 (Expr.access 
  -                (Expr.field (Cache.crawlPrototypeChain object' (classIds.Length)) "Properties") 
  -                [Expr.field cache "index"]
  +                (Expr.field (Cache.crawlPrototypeChain obj' (classIds.Length)) "Properties") 
  +                [Expr.field x' "index"]
                 )
               else
                 //... or not
  
positive.code:           if success then cached
            else
              //Parameters
              let cache = Expr.paramT<SetCache> "~cache"
              let object' = Expr.paramT<Object> "~object"
              let value = Expr.param "~value" (typeof<Box>.MakeByRefType()) 
              let env' = Expr.paramT<Environment> "~env"
  
              //Build lambda expression
              let lambda = 
                (Expr.lambdaT<SetCrawler> 
                  [cache; object'; value; env']
                  (Expr.ternary 
                    //Condition: Object + All Prototypes must
                    //not be null and have matching ClassIds
                    (Cache.buildCondition object' (obj.ClassId :: classIds))
  
                    //If condition holds, execute body
                    (Expr.castVoid
                      (Expr.assign
                        (Expr.access 
                          (Expr.field (Cache.crawlPrototypeChain object' (classIds.Length)) "Properties") 
                          [Expr.field cache "index"]
                        )
                        (value)
                      )
                    )
  
                    //If condition fails, update
                    (Expr.call cache "Update" [object'; value; env'])
                  )
                )
  
  
negative.code:         //Else build a new one
          else
            //Parameters
            let x' = Expr.paramT<GetCache> "~cache"
            let obj' = Expr.paramT<Object> "~object"
            let env' = Expr.paramT<Environment> "~env"
  
            //Body differs
  