prow/config/branch_protection.go
func unionStrings(parent, child []string) []string {
	if child == nil {
		return parent
	}
	if parent == nil {
		return child
	}
	s := sets.NewString(parent...)
	s.Insert(child...)
	return s.List()
}
func unionStrings(parent, child []string) []string {
	if child == nil {
		return parent
	}
	if parent == nil {
		return child
	}
	s := sets.NewString(parent...)
	s.Insert(child...)
	return s.List()
}
func unionStrings ( parent , child [ ] string ) [ ] string { if child == nil { return parent } if parent == nil { return child } s := sets . NewString ( parent ... ) s . Insert ( child ... ) return s . List ( ) }
// unionStrings merges the parent and child items together
unionStrings merges the parent and child items together