prow/plugins/approve/approvers/owners.go
func (o Owners) GetOwnersSet() sets.String {
	owners := sets.NewString()
	for _, fn := range o.filenames {
		owners.Insert(o.repo.FindApproverOwnersForFile(fn))
	}
	o.removeSubdirs(owners)
	return owners
}
func (o Owners) GetOwnersSet() sets.String {
	owners := sets.NewString()
	for _, fn := range o.filenames {
		owners.Insert(o.repo.FindApproverOwnersForFile(fn))
	}
	o.removeSubdirs(owners)
	return owners
}
// GetOwnersSet returns a set containing all the Owners files necessary to get the PR approved