public Builder setGuestDescription(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      guestDescription_ = value;
      bitField0_ |= 0x00000400;
      onChanged();
      return this;
    }
<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>

@param value The guestDescription to set.
@return This builder for chaining.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/VmwareVmDetails.java