Warning by ngclient.api about sync api call before form loading

[og1]

After upgrading to release 8.4 build 3402 I get a warning when I start my application. The warning is this:
WARN com.servoy.j2db.server.ngclient.api - You are doing a sync api call in form 'main' before form is loaded, this should be avoided (Component : sideNav , api: setMenuItemExpanded ).

I am expanding the menu in the onShow of the main form which is triggered after loading the form. In fact that is the last place where I can expand the menu before my application has completely started.

[costescuandrei]

setMenuItemExpanded(...) does return a value (success or not) - so it can't simply be made async in the .spec. Do you require that return value in this case?
A setMenuItemExpandedAsync(...) which does not return anything and runs async (so after current code is executed) could be added.