Github user jorgebay commented on the issue: https://github.com/apache/tinkerpop/pull/695 I've pushed 2 commits to address the issues highlighted in the review. I got rid of the promise factory and I'm using rest parameters and spread syntax (instead of `parseArgs()`) for `GraphTraversal` and `GraphTraversalSource` methods. In order to ease up maintenance of the GLV, I've bumped the min version supported of the runtime to Node.js 6, as Node.js 4 is [reaching EOL in April](https://github.com/nodejs/Release) and it didn't support several ES2015 features (rest parameters being one of them).
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