Is is possible to loop through the dependencies of the Semantic Graph Annotation?

[Eric-Ryan]

I get a NullException error for using "java.util.ArrayList". I have also tried "java.util.AbstractSet" and "java.util.AbstractCollection" but got the same error. This is my attempt:

var dependencyGraphAnnotation = new SemanticGraphCoreAnnotations.BasicDependenciesAnnotation().getClass();
var dependencies = sentence.get(dependencyGraphAnnotation);

foreach (var dependency in dependencies java.util.ArrayList) // I get NullExceptionError here
{
    Console.WriteLine(dependency);

    // Console.WriteLine(dependency.value());
    // Console.WriteLine(dependency.label());

    if (dependency.ToString().Equals("nsubj"))
    {
        Console.WriteLine(" hello world ");
    }

}

[Eric-Ryan]

I fixed it by doing this:

var dependencies = sentence.get(dependencyGraphAnnotation) as edu.stanford.nlp.semgraph.SemanticGraph;