public static Object Run(this IInteractivity interactivity, Engine engine, String source)
{
var parser = engine.Parser;
var scope = engine.Scope;
var statements = parser.ParseStatements(source);
var operations = statements.MakeRunnable();
var context = new ExecutionContext(operations, scope);
using (interactivity.HandleCancellation(TriggerStop(context)))
{
context.Execute();
return(context.Pop());
}
}