velodrome/transform/plugins/type_filter_wrapper.go
func (t *TypeFilterWrapperPlugin) ReceiveIssue(issue sql.Issue) []Point {
	if issue.IsPR && t.pullRequests {
		return nil
	} else if !issue.IsPR && t.issues {
		return nil
	} else {
		t.pass[issue.ID] = true
		return t.plugin.ReceiveIssue(issue)
	}
}
func (t *TypeFilterWrapperPlugin) ReceiveIssue(issue sql.Issue) []Point {
	if issue.IsPR && t.pullRequests {
		return nil
	} else if !issue.IsPR && t.issues {
		return nil
	} else {
		t.pass[issue.ID] = true
		return t.plugin.ReceiveIssue(issue)
	}
}
// ReceiveIssue calls plugin.ReceiveIssue() if issues are not ignored