如何将std::vector<thrust::device_vector<int>>转换为int**？

#include <vector>
#include <thrust/device_vector.h>

std::vector<thrust::device_vector<int>> vecOfDeviceVectors;

// 填充数据
thrust::device_vector<int> deviceVector1;
deviceVector1.push_back(1);
deviceVector1.push_back(2);
deviceVector1.push_back(3);

thrust::device_vector<int> deviceVector2;
deviceVector2.push_back(4);
deviceVector2.push_back(5);
deviceVector2.push_back(6);

vecOfDeviceVectors.push_back(deviceVector1);
vecOfDeviceVectors.push_back(deviceVector2);

int** intArray = new int*[vecOfDeviceVectors.size()];

for (size_t i = 0; i < vecOfDeviceVectors.size(); ++i) {
    intArray[i] = new int[vecOfDeviceVectors[i].size()];
}

for (size_t i = 0; i < vecOfDeviceVectors.size(); ++i) {
    thrust::device_vector<int>& deviceVector = vecOfDeviceVectors[i];
    int* intArrayRow = intArray[i];

    for (size_t j = 0; j < deviceVector.size(); ++j) {
        intArrayRow[j] = deviceVector[j];
    }
}