public GetExtensionRequest withExtensionIdentifier(String extensionIdentifier) {
        setExtensionIdentifier(extensionIdentifier);
        return this;
    }
<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.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-appconfig/src/main/java/com/amazonaws/services/appconfig/model/GetExtensionRequest.java