added TypeDoc

src/app/core/metadata/metadata-field.model.ts

@@ -52,6 +52,9 @@ export class MetadataField implements ListableObject {
     return key;
   }
 
+  /**
+   * Method that returns as which type of object this object should be rendered
+   */
   getRenderTypes(): Array<string | GenericConstructor<ListableObject>> {
     return [this.constructor as GenericConstructor<ListableObject>];
   }