fix(core-components): make onToggle a non-required prop in ModelCollapse (#4100)

src/core/components/model-collapse.jsx

@@ -8,13 +8,14 @@ export default class ModelCollapse extends Component {
     children: PropTypes.any,
     title: PropTypes.element,
     modelName: PropTypes.string,
-    onToggle: PropTypes.func.isRequired
+    onToggle: PropTypes.func
   }
 
   static defaultProps = {
     collapsedContent: "{...}",
     expanded: false,
-    title: null
+    title: null,
+    onToggle: () => {}
   }
 
   constructor(props, context) {

src/core/components/object-model.jsx

@@ -12,7 +12,7 @@ export default class ObjectModel extends Component {
     getComponent: PropTypes.func.isRequired,
     getConfigs: PropTypes.func.isRequired,
     expanded: PropTypes.bool,
-    onToggle: PropTypes.func.isRequired,
+    onToggle: PropTypes.func,
     specSelectors: PropTypes.object.isRequired,
     name: PropTypes.string,
     isRef: PropTypes.bool,