How to provide repeated string deploy_to_downstream_environments to the frontend?

[ds-frankgi]

Our FDC dev team in DS implemented the client side with go package mime.multipart.

For the commit c14b4d6#diff-1a2c7d4b2d78782768dc4449dbb8e6fb964eaf7a97d631faebd14adaec1fb6d9 we try to figure out how to provide

repeated string deploy_to_downstream_environments

Apparently the method WriteField does not cope with the placement of an array/list. How did you test it on the frontend? Must we use a different go package?

Any help appreciated here.