GitLab

* fix bugs in partitioning on heterogeneous graphs.

* fix.

* fix.

* fix example.

* fix.

* fix test.

* fix.

* fix.

* fix.

* fix tests.
Co-authored-by: Ubuntu <ubuntu@ip-172-31-71-112.ec2.internal>
Co-authored-by: Zheng <dzzhen@3c22fba32af5.ant.amazon.com>