* new functional for creating data splits in graph
* minor fix in data split implementation
* apply suggestions from code review
Co-authored-by: Mufei Li <mufeili1996@gmail.com>
* refactoring + unit tests
* fix test file name
* move imports to the top
* Revert "fix test file name"
This reverts commit 126323e38c.
* remove nccl submodule
* address linter issues
---------
Co-authored-by: Mufei Li <mufeili1996@gmail.com>
Co-authored-by: Hongzhi (Steve), Chen <chenhongzhi.nkcs@gmail.com>