# API Changes in v2.55

> Reference: API changes of Opc.UaFx.Advanced in v2.55: 2 added, 0 removed, 0 changed, 0 obsoleted.

<dl class="api-definition">
<dt>Release</dt>
<dd>v2.55.0</dd>
<dt>Compared with</dt>
<dd>v2.54.1.1</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced</dd>
</dl>

## Added

### Opc.UaFx

| Symbol | Signature |
|---|---|
| [OpcConditionNode.IsRetainedPolicy](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcconditionnode/members#isretainedpolicy) | `public OpcConditionRetainPolicy IsRetainedPolicy { get; set; }` |
| [OpcConditionRetainPolicy](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcconditionretainpolicy/)<span class="api-meta">5 members</span> | `public enum OpcConditionRetainPolicy` |