NPE at startup when an OPTIONS endpoint is defined in RAML

...elided...
  /login:
    options:
      description: "Preflight CORS for /saml/login"
      responses:
        200:
          description: "Return with appropriate CORS headers"
...elided...

java.lang.NullPointerException
	at org.folio.rest.MappedClasses.addPath(MappedClasses.java:28)
	at org.folio.rest.RestVerticle.lambda$15(RestVerticle.java:990)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at org.folio.rest.RestVerticle.lambda$14(RestVerticle.java:986)
	at java.util.LinkedHashMap$LinkedKeySet.forEach(LinkedHashMap.java:559)
	at org.folio.rest.RestVerticle.lambda$13(RestVerticle.java:983)
	at java.util.LinkedHashMap$LinkedKeySet.forEach(LinkedHashMap.java:559)
	at org.folio.rest.RestVerticle.populateConfig(RestVerticle.java:978)
	at org.folio.rest.RestVerticle.start(RestVerticle.java:219)
	at io.vertx.core.impl.DeploymentManager.lambda$doDeploy$9(DeploymentManager.java:556)
	at io.vertx.core.impl.ContextImpl.executeTask(ContextImpl.java:366)
	at io.vertx.core.impl.EventLoopContext.lambda$executeAsync$0(EventLoopContext.java:38)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:748)