javadoc says there is a getBuildCooldownTurns() method in RobotController class. But there actually isn't one.
Shows up for me
This is a new method added with the last update, so you may not be seeing it if your local client is out of date. Make sure your client is up-to-date with the latest version. You can update it manually using ./gradlew --refresh-dependencies build on the command line, or read through http://www.battlecodeforum.org/t/forcing-battlecode-updates-fix-client-issues/216 to force your client to auto-update more frequently
./gradlew --refresh-dependencies build