Create Page in OneNote using Java SDK v6.x

My current app successfully creates pages in OneNote using the Java SDK 5.x. I am looking to update to the latest Java SDK 6.x (in the process of also adding support for OneDrive).

I have read through the Microsoft Graph Java SDK v6 Changelog and Upgrade Guide and am obtaining valid tokens. I can't find, however, any documentation or examples of how to create a page in OneNote using the Java SDK 6.x. The article Create onenotePage provides examples for HTTP, CLI, and JavaScript, but is missing the examples for C#, Go, Java, etc. provided for other actions such as Create notebook.

Is it possible to create pages using the Java SDK 6.x? Are there any examples?

I have tried the Kotlin code below in the absence of documentation, but always receive the error "The multi-part payload was malformed". Debugging by enabling okhttp logging leads me to believe that this approach results in posting a serialized version of the OnenotePage object rather than the contents field as required. (I didn't provide my initialization for 'contents' as the whole approach seems invalid.)

val mypage = OnenotePage()
mypage.content = content

mGraphClient!!.me().onenote()
    .pages()
    .withUrl("https://graph.microsoft.com/v1.0/me/onenote/pages?sectionName=MySection")
    .post(mypage) { requestConfiguration ->
        requestConfiguration.headers.add(
            "content-type",
            "multipart/form-data; boundary=MyBoundary1234"
        )
    }

Start with the Microsoft Graph Java SDK v6 Upgrade Guide and the OneNote create-page article linked in the issue, then compare the available Java SDK request patterns with the existing HTTP and JavaScript examples. Confirm the supported multipart request shape and document a working Java 6.x example, including the expected request content and a clear completion check.