Delete null assertion

packages/core/src/dom_components/model/SymbolUtils.ts

@@ -131,8 +131,8 @@ export const logSymbol = (symb: Component, type: string, toUp: Component[], opts
 };
 
 export const updateSymbolProps = (symbol: Component, opts: SymbolToUpOptions = {}): void => {
-  const changed = symbol.componentDVListener.getPropsDefsOrValues({ ...symbol.changedAttributes() } || {});
-  const attrs = symbol.componentDVListener.getAttributesDefsOrValues({ ...changed.attributes } || {});
+  const changed = symbol.componentDVListener.getPropsDefsOrValues({ ...symbol.changedAttributes() });
+  const attrs = symbol.componentDVListener.getAttributesDefsOrValues({ ...changed.attributes });
 
   cleanChangedProperties(changed, attrs);