public void addStep(final String stepName, final Object... arguments) {
        addToGremlin(stepName, arguments);
    }
Add a {@link Traversal} instruction to the GremlinLang.

@param stepName  the traversal method name (e.g. out())
@param arguments the traversal method arguments
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/GremlinLang.java