org.mongodb.scala.FindObservable.execute() method missing base on example code

I found the latest version of the ScalaDoc for org.mongodb.scala.FindObservable

and it does not have any function signature for execute().

How do I achieve the first basic objective of taking a resulting documents (based on the query I provided) into a list of JSON that I can work with in Scala?

My client connection to the MongoDB is good based on the client.getClusterDescription.

res0: com.mongodb.connection.ClusterDescription = ClusterDescription{type=SHARDED, connectionMode=SINGLE, serverDescriptions=[ServerDescription{address=fqdn.company.com:90123, type=SHARD_ROUTER, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=5, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=null, roundTripTimeNanos=161857314}]}

If there are other triaging or diagnostic methods I can run to illuminate this current issues, please free to chime in. Thanks!