anchor.diff:        println("Writing...")
         oomNewItemBatch.serially.flatMap(_.concurrently.map(item => write(item.id, item)))
       }
  -  } yield oomResult.forall(_ === true)
  -}
  -----
  -
  -=== Transforming and traversing collections using workers
  +  } yield oomResult.forall(_ == true)
  +}
  +----
  +
  +== Transforming and traversing collections using workers
   
   +s_mach.concurrent+ provides the +workers+ method which allows specifying the maximum number of concurrent operations.
   
  
positive.code: ----
  
  
  === Imports for Examples
  All code examples assume the following imports:
  [source,scala,numbered]
  ----
  
negative.code:           } yield acc ::: oomResult
          }
      }
    } yield oomResult.forall(_ == true)
  }
  ----
  
  