Function cuvsCagraIndexGetSize 

pub unsafe extern "C" fn cuvsCagraIndexGetSize(
    index: cuvsCagraIndex_t,
    size: *mut i64,
) -> cuvsError_t

@brief Get size of the CAGRA index

@param[in] index CAGRA index @param[out] size return number of vectors in the index @return cuvsError_t