default <T> T getOrDefault(IClientConfigKey<T> key) {
        return get(key, key.defaultValue());
    }
Returns a typed property. If the property of IClientConfigKey is not set, it returns the default value, which
could be null.
<p>
<ul>
<li>Integer</li>
<li>Boolean</li>
<li>Float</li>
<li>Long</li>
<li>Double</li>
</ul>
<br><br>
ribbon-core/src/main/java/com/netflix/client/config/IClientConfig.java