Merge pull request #724 from magieno/2024-09-fix-issues-with-nested-t…

…ypes-in-data-node

- Adds missing conditional to avoid a breakage further down.

packages/data-mapping-common/src/nodes/data-mapping.node.ts

@@ -178,7 +178,7 @@ export class DataMappingNode extends BaseDataMappingNode {
                     if(typeof this.destinationType === "function" && !this.destinationType.prototype) {
                         const destinationType: ArrayMemberTypeFactoryCallbackType = this.destinationType as ArrayMemberTypeFactoryCallbackType;
                         dest = plainToInstance(destinationType(source, this.sourceProperty, index).constructor, options?.excludeExtraneousValues === false ? element: {});
-                    } else {
+                    } else if(this.destinationType.prototype) {
                         dest = plainToInstance(this.destinationType as ClassConstructor<any>, {})
                     }
                 }