https://docs.cloud.google.com/java/docs/reference/google-cloud-bigtable/latest/com.google.cloud.bigtable.data.v2.models.ChangeStreamMutation.MutationType
Enum ChangeStreamMutation.MutationType (2.77.0) | Java client libraries | Google Cloud Documentation
https://beam.apache.org/releases/javadoc/2.33.0/org/apache/beam/sdk/io/cassandra/CassandraIO.MutationType.html
CassandraIO.MutationType (Apache Beam 2.33.0)
apache beam