Add to_string and serialize to optional
Add to_string and serialize to optional

actor-framework/actor-framework,nq-ebaratte/actor-framework,nq-ebaratte/actor-framework,nq-ebaratte/actor-framework,DavadDi/actor-framework,actor-framework/actor-framework,actor-framework/actor-framework,1blankz7/actor-framework,nq-ebaratte/actor-framework,1blankz7/actor-framework,DavadDi/actor-framework,DavadDi/actor-framework,DavadDi/actor-framework,actor-framework/actor-framework,1blankz7/actor-framework,1blankz7/actor-framework