is possible define the threadNumber as a user parameter?

[Fulvio Guglielmelli]

ciao
  I need to define as Parameter the thread numer for a threadGroup.
   
  This is my scenario
   
  Test Plan
      User Parameter (tn = 3)
      Thread Group AAAA (Number of threads = ${tn} )
        + JavaRequest 1
      Thread Group BBBB (${tn})
        + JavaRequest 2 (with 1 parameter ${tn})

  Is possible

                
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