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Benefits of proposed solution

Open points

1. Incompatibility with existing Python actors!
2. Diagnostic info 
   1. Info returned from user method
      1. status flag
      2. user defined message
   2. 'soft' return from user method in case of any errorQ: can it be mandatory in user sbrt?
3.  Sandbox:
   1. Do we need this feature?
4. Alternative library:
   1. Do we need this feature?

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