Problem with while creating a custom multiple file upload wplugable web widget

Hey,   I am creating a cutom widget for file upload. Currenlty I have succeesfully created a view and I am able to create file entities using the Mendix 9 client API. But I am having trobles while dealing with the content of the files. How can I save the contents of the file to the mendix using the client API ?
1 answers

I have been able to find the corresponding API. Here is the link to the method's documentation.