Hiding shape layer is broken after GTK4/libshumate porting

Hiding a shapelayer (loading a layer and clicking on the "eye" button) is currently broken

(org.gnome.Maps.Devel:2): Gjs-CRITICAL **: 21:50:51.413: JS ERROR: TypeError: this._markerLayer.hide_all_markers is not a function
set visible@resource:///org/gnome/Maps/Devel/js/shapeLayer.js:78:31
ShapeLayerRow/<@resource:///org/gnome/Maps/Devel/js/layersPopover.js:50:39
main@resource:///org/gnome/Maps/Devel/js/main.js:55:24