https://groups.google.com/forum/#!topic/mapstore-developers/fvMDm8SI-fI

naive_way_to_add_exclusive_layers_feature_to_groups.patch

Index: web/client/reducers/layers.js
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- web/client/reducers/layers.js	(revision 8c7f43eb38f2e17e9fec7b7816c5fb96dde08622)
+++ web/client/reducers/layers.js	(date 1579704777330)
@@ -163,8 +163,23 @@
                 // TODO remove
                 return assign({}, layer, {visibility: false});
             }
+            // check if layer shall be exclusive
+            const groups = (state.groups);
+            for (let i in groups) {
+                const group = groups[i];
+                if (group.id === layer.group) {
+                    // get group of layer
+                    if (group.title === 'exclusive') {
+                        if (action.newProperties && action.newProperties.visibility) {
+                            console.log(layer.title + " should not be visible anymore");
+                            return assign({}, layer, {visibility: false});
+                        }
+                    }
+                }
+            }
             return assign({}, layer);
         });
+
         return assign({}, state, {flat: newLayers});
     }
     case CHANGE_GROUP_PROPERTIES: {