Powershell example on how to upload large files using Graph

Hi, 

Does somebody have an example on how to use Graph to upload large files to a sharepoint library using an uploadsession as prescribed by Microsoft in the Graph API reference : Graph API reference Upload Session ?

I am able to get access to Graph using a token by making an Azure AD application. I am able to get the necessary drive ID's of the libraries. Where i'm lost is the part where you have to chunk up the file you want to upload and how to send the binary parts within the invoke-restmethode instructions. Does sombody have an example or can somebody point me in the right direction ?

thx

robtor