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        The execution::executor_shape
        trait detects the type used by an executor to represent the shape of a bulk
        operation.
      
template<
    typename T>
struct executor_shape
| Name | Description | 
|---|---|
| T::shape_type if T::shape_type is valid, otherwise std::size_t. | 
        Class template executor_shape is a type trait with a nested
        type alias type whose type is T::shape_type if
        T::shape_type is valid, otherwise std::size_t.
      
        Header: boost/asio/execution/executor.hpp
      
        Convenience header: boost/asio/execution.hpp