Link to manualapplicationrecipe

Importing the class

Link to importing-the-class

It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.

import mods.createtweaker.ManualApplicationRecipe;

Extending ItemApplicationRecipe

Link to extending-itemapplicationrecipe

ManualApplicationRecipe extends ItemApplicationRecipe. That means all methods available in ItemApplicationRecipe are also available in ManualApplicationRecipe