New Post: Internals class and method

I beg you to make public all the internal methods and classes.
Otherwise, I have to edit the source code or completely copied.
Example:
I need additional arguments for WixSharp.CommonTasks.Tasks.InstallService (user and password).
I wanted to create a task, but class ExternalTool is internal.
Or I wanted to create a WixPathEdit base from WixTextBox.