how to convert the coloroctree to octree

[chengm0-0]

Hi, when I use the fcl library to do the path planning, I want to convert the coloroctree to octree, but I do not find any method. I have tried the following way, but it did not make any difference.
octomap::ColorOcTree* octree = new octomap::ColorOcTree(0.1);
octomap::OcTree* octree1 = dynamic_castoctomap::OcTree*(octree);
Could you help me solve this question?
Thanks! :)