Function cuvsProductQuantizerGetPqDim 

pub unsafe extern "C" fn cuvsProductQuantizerGetPqDim(
    quantizer: cuvsProductQuantizer_t,
    pq_dim: *mut u32,
) -> cuvsError_t

@brief Get the dimensionality of the vector after compression by PQ.

@param[in] quantizer product quantizer @param[out] pq_dim dimensionality of the vector after compression by PQ