set port side in the node implementation of the glsp server

[jdeantoni]

Dear community,

I'm trying to force some port to be on the east side of a component (glsp 2.4.0, elkjs 0.10.0).
I already tried many things but without success.
This is the version, which to my understanding should work:

const builder = GNode.builder()
	        .type('node:componentnode')
	        .id(compNode.id)
	        .layout('hbox')
	        .addLayoutOption("elk.portConstraints", "FIXED_SIDE")   // <-- force fixed side
	        .position(compNode.position);
		
const inPort: GPort = GPort.builder()
		.id("port"+sub.id) 
		.type('node:inport')
		.addLayoutOption('port.side', "EAST")               //  <-- ask for east side placement
		.size(10, 10)         
		.addCssClass('inport')
		.build();

builder.add(inPort)

However all my port are still on the WEST side...
I saw some examples looking like this in Java but not in node.
Any help is more than welcome

PS: I noticed when trying to use elkjs online on my underlying JSON that the structure is a bit different, typically, ports are stored into "children" while stored into "ports" in the examples. Not sure about the impact...