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        Traits type used to obtain the cancellation_slot
        associated with an object.
      
template<
    typename T,
    typename CancellationSlot = cancellation_slot>
struct associated_cancellation_slot
| Name | Description | 
|---|---|
| If T has a nested type cancellation_slot_type, T::cancellation_slot_type. Otherwise CancellationSlot. | 
| Name | Description | 
|---|---|
| get [static] | If T has a nested type cancellation_slot_type, returns t.get_cancellation_slot(). Otherwise returns s. | 
        A program may specialise this traits type if the T template
        parameter in the specialisation is a user-defined type. The template parameter
        CancellationSlot shall be a type meeting the CancellationSlot
        requirements.
      
        Specialisations shall meet the following requirements, where t
        is a const reference to an object of type T, and s
        is an object of type CancellationSlot.
      
type that identifies a type meeting
            the CancellationSlot requirements.
          get, callable
            as get(t) and with return type type.
          get, callable
            as get(t,s) and with return type type.
          
        Header: boost/asio/associated_cancellation_slot.hpp
      
        Convenience header: boost/asio.hpp