removeIfcModel(modelID) {
            try {
                this.context.items.ifcModels.splice(modelID, 1);
                this.context.items.pickableIfcModels.splice(modelID, 1);
                this.shadowDropper.deleteShadow(modelID.toString());
                const scene = this.context.getScene();
                this.loader.ifcManager.close(modelID, scene);
            }
            catch (e) {
                console.log(`Removing IfcModel ${modelID} failed`);
            }
        }
Remove & dispose ifcmodel
@modelID ID of the IFC model.