Construct an windows::object_handle without opening it.

explicit object_handle(
    boost::asio::io_context & io_context);
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Construct an windows::object_handle on an existing native handle.

object_handle(
    boost::asio::io_context & io_context,
    const native_handle_type & native_handle);
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Move-construct an windows::object_handle from another.

object_handle(
    object_handle && other);
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