public default Admin<T> asAdmin() {
        return (Admin<T>) this;
    }
Typecast the traverser to a "system traverser" so {@link Traverser.Admin} methods can be accessed.
This is used as a helper method to avoid the awkwardness of <code>((Traverser.Administrative)traverser)</code>.
The default implementation simply returns "this" type casted to {@link Traverser.Admin}.

@return The type-casted traverser
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/Traverser.java