public com.google.cloud.vmwareengine.v1.HcxActivationKey getHcxActivationKey() {
      if (hcxActivationKeyBuilder_ == null) {
        return hcxActivationKey_ == null
            ? com.google.cloud.vmwareengine.v1.HcxActivationKey.getDefaultInstance()
            : hcxActivationKey_;
      } else {
        return hcxActivationKeyBuilder_.getMessage();
      }
    }
<pre>
Required. The initial description of a new HCX activation key. When
creating a new key, this field must be an empty object.
</pre>

<code>
.google.cloud.vmwareengine.v1.HcxActivationKey hcx_activation_key = 2 [(.google.api.field_behavior) = REQUIRED];
</code>

@return The hcxActivationKey.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/CreateHcxActivationKeyRequest.java