Add queries which show the entered user Snippet of Java code wrapped into a complete valid unit of Java code. Also add a query for dependencies of a Snippet.

In SourceCodeAnalysis, add:

    public interface SnippetWrapper {
       String source();
       String wrapped();
       String fullClassName();
       Snippet.Kind kind();
       int sourceToWrappedPosition(int pos);
       int wrappedToSourcePosition(int pos);
    }

    SnippetWrapper wrapper(Snippet snippet);
    List<SnippetWrapper> wrappers(String input);
    List<Snippet> dependents(Snippet snippet);