tree c5e0a9356e9692c8cfdb56ab9c0e2355f0c16565
parent 3e635cf5e26e33d6210d3092256a49291752deec
author Qunxin Liu <qxliu@google.com> 1632419481 -0700
committer Behdad Esfahbod <behdad@behdad.org> 1633808240 -0600

[subset] code cleanup

- rename copy() method if it takes extra parameter
- get rid of same code blocks