@Override
    public boolean exists(final String location) {
        return thereIsMatching(location);
    }
@param pattern
@return true if the pattern is actually a path as of the path definition in {@linkplain Storage}

NOTE: a more precise syntax check is possible
spark-gremlin/src/main/java/org/apache/tinkerpop/gremlin/spark/structure/io/SparkContextStorage.java