Umbraco 13 customize the generated models while generating models via Model builder

Questions
1

Hello,
I would like to add my extension method to the generated models using Model Builder. Is it possible in Umbraco 13?

Example

This is the default generated code for my property using Model Builder.

public virtual string Testtest => this.Value(_publishedValueFallback, “testtest”);

But I want to generate the model property using Model Builder with my extension method like,

public virtual string Testtest => this.GetValueWithLanguage(_publishedValueFallback, “testtest”);

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/114480-umbraco-13-customize-the-generated-models-while-generating-models-via-model-builder