prow/config/tide.go
func (t *Tide) MergeMethod(org, repo string) github.PullRequestMergeType {
	name := org + "/" + repo

	v, ok := t.MergeType[name]
	if !ok {
		if ov, found := t.MergeType[org]; found {
			return ov
		}

		return github.MergeMerge
	}

	return v
}
func (t *Tide) MergeMethod(org, repo string) github.PullRequestMergeType {
	name := org + "/" + repo

	v, ok := t.MergeType[name]
	if !ok {
		if ov, found := t.MergeType[org]; found {
			return ov
		}

		return github.MergeMerge
	}

	return v
}
// MergeMethod returns the merge method to use for a repo. The default of merge is
// returned when not overridden.