Which API shows that the collective operations include barrier, all-to-one, all-to-all, and reduction operations?

[XCloudAI]

Below page says that The collective operations include barrier, all-to-one, all-to-all, and reduction operations. When possible, we will take advantage of hardware acceleration for collectives (e.g., InfiniBand Switch collective acceleration).
https://openucx.github.io/ucx/api/v1.10/html/md__hpc_mtr_scrap_users_yosefe_ucx_docs_doxygen_design.html#UCP
Which API shows this capability? Any example code to show how to use them?

[shamisp]

This capability was spawn into the separate project: https://github.com/openucx/ucc