@SuppressWarnings({"rawtypes"})
      protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
          int number) {
        switch (number) {
          case 4:
            return internalGetEnv();
          default:
            throw new RuntimeException("Invalid map field number: " + number);
        }
      }
<pre>
A Docker container.
</pre>

Protobuf type {@code google.cloud.workstations.v1.WorkstationConfig.Container}
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/WorkstationConfig.java