symfony2.4 - symfony2 use global validator service in my own service -

I'm new to Symphony, and I see in documents that I can get validator service in the controller and use it I can:

  $ this-> Receive ('validator');  

What is the correct way to get a valid service in my own service class?

Thanks

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Put it in service like this

  your.service: class: path \ to \ your \ service arguments: [ @validator]