How to implement new Cypher feature?

1. Pick a representative Cypher query (tck might be the source for additional cases)
2. Find the translation to Gremlin
3. Write integration test
   • See where execution fails. Usually, stacktrace is a good indication of the starting point where the translation is not implemented.
4. Implement (if necessary):
   • Missing Gremlin steps in GremlinSteps implementations
   • Translation in walkers
   • In case translation is impossible to achieve using native Gremlin steps, implement CustomFunctions and CustomPredicates
   • Optimization in rewriters
5. Ensure that changes don't break existing functionality by running gradle clean build and tck