How to Create a Plugin Configuration Page

To create a configuration page for a plugin that does not already have the

Configure icon displayed in the Administration page, follow these steps:

Register a WebappServlet extension type with a role attribute set to config in your plugin.xml file, as in the following example:
```
<extension type="WebappServlet" role="config" class="com.example.MyPluginConfigExtension"/>
```
The class attribute value should point to an extension of the PluginConfigExtension class.
When extending the PluginConfigExtension class, consider the following notes:
- Implement the getOptionsForm method to return an HTML form and make sure that contains inputs with the input name attribute the same as the option you want to configure.
- Implement the getOptionsJson method to return a JSON string of the current options for a plugin. (The JSON should only contain key values, where values is of the type string|number|boolean with no arrays or other objects).
- Implement the getPath method to return a non-empty string that represents the path for which this extension will be served.
  For example:
```
 {webapp-context}/plugins-dispatcher/RESULT_OF_GETPATH
```
- If you need to override the init method, make sure you call super.init(). Otherwise, options will not be saved to disk and will be lost when you restart the application.
- If you need to override any of the doPut/doDelete methods, make sure you call the saveOptions method at the end to save the options to disk.
- If you need to override the doGet method, make sure it responds with the result of getOptionsForm for header Accept=text/html, and with the result of getOptionsJson when called with header Accept=application/json. Use the getOption or getDefaultOptions methods to access the current or default options.
Tip: For an implementation example, you can look at com.oxygenxml.sdksamples.github.GithubPluginConfigExtension in the webapp-github-plugin project.

Result: A

Configure icon is now displayed next to its name in the Administration page.