@java.lang.Override
  public java.lang.String getGuestDescription() {
    java.lang.Object ref = guestDescription_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      guestDescription_ = s;
      return s;
    }
  }
<pre>
The VM's OS. See for example
https://vdc-repo.vmware.com/vmwb-repository/dcr-public/da47f910-60ac-438b-8b9b-6122f4d14524/16b7274a-bf8b-4b4c-a05e-746f2aa93c8c/doc/vim.vm.GuestOsDescriptor.GuestOsIdentifier.html
for types of strings this might hold.
</pre>

<code>string guest_description = 11;</code>

@return The guestDescription.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/VmwareVmDetails.java