@java.lang.Override
    public com.google.cloud.vmmigration.v1.PreparingVMDisksStepOrBuilder
        getPreparingVmDisksOrBuilder() {
      if ((stepCase_ == 6) && (preparingVmDisksBuilder_ != null)) {
        return preparingVmDisksBuilder_.getMessageOrBuilder();
      } else {
        if (stepCase_ == 6) {
          return (com.google.cloud.vmmigration.v1.PreparingVMDisksStep) step_;
        }
        return com.google.cloud.vmmigration.v1.PreparingVMDisksStep.getDefaultInstance();
      }
    }
<pre>
Preparing VM disks step.
</pre>

<code>.google.cloud.vmmigration.v1.PreparingVMDisksStep preparing_vm_disks = 6;</code>
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/CutoverStep.java