I am using OpenCL with the CL/cl.hpp c++ wrappers.
So I have c++ objects such as e.g. `cl::CommandQueue` instead of `cl_command_queue`.

I am also wanting to use AMD's BLAS library, clAmdBlas. The functions there require a `cl_command_queue` as one of their arguments.

How do I get `cl_command_queue` from `cl::CommandQueue`?