public void setExtensionIdentifier(String extensionIdentifier) {
        this.extensionIdentifier = extensionIdentifier;
    }
<p>
The name, the ID, or the Amazon Resource Name (ARN) of the extension.
</p>

@param extensionIdentifier
       The name, the ID, or the Amazon Resource Name (ARN) of the extension.
aws-java-sdk-appconfig/src/main/java/com/amazonaws/services/appconfig/model/ActionInvocation.java