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        The execution::is_operation_state
        trait detects whether a type T satisfies the execution::operation_state concept.
      
template<
    typename T>
struct is_operation_state
        Class template is_operation_state is a type trait that is derived
        from true_type if the type T meets the concept
        definition for an operation_state, otherwise false_type.
      
        Header: boost/asio/execution/operation_state.hpp
      
        Convenience header: boost/asio/execution.hpp