code: function create(behavior) {
          
          /*
            * `message`: _Any_ Any message.
  
            Asynchronously sends the `message` to the `actor`.
          */
          var actor = function send(message) {
              dispatch(function deliver() {
                  try {
                      context.behavior(message);
                  } catch (exception) {
                      fail(exception);
                  };
              });
          };
          var context = {
              self: actor,
              behavior: behavior,
              sponsor: sponsor
          };
          return actor;
      }
docs: /*
  `behavior`: _Function_ `function (message) {}` Actor behavior to
  invoke every time an actor receives a message.
  Return: _Function_ `function (message) {}` Actor reference that can be
  invoked to send the actor a message.
  
  Creates a new actor and returns the actor reference in form of a capability
  to send that actor a message.