GitHub user okram opened a pull request:
TINKERPOP-1291: Remove deprecated mapValues and mapKeys methods
Removed `GraphTraversal.mapValues()` and `GraphTraversal.mapKeys()`. These were replaced (long ago) by `select(values)` and `select(keys)`.
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This closes #659
Author: Marko A. Rodriguez <email@example.com>
removed deprecated GraphTraversal.mapKeys() and GraphTraversal.mapValues(). These steps were deprecated long ago and replaced with select(keys) and select(values), respectively.