Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/beam/vendor/guava/v20_0/com/google/common/base/Preconditions
    at org.apache.beam.sdk.io.cassandra.CassandraIO$Read.withHosts(CassandraIO.java:180)
    at org.apache.beam.examples.JoinFromCassandraToCassandra.main(JoinFromCassandraToCassandra.java:26)