Link to iitemdestroyedblock

The IItemDestroyedBlock function can be added to an Item and will run whenever you try to break a block with the assiciated Item.

Importing the package

Link to importing-the-package

It might be required for you to import the package if you encounter any issues, so better be safe than sorry and add the import.
import mods.contenttweaker.IItemDestroyedBlock;

The IItemDestroyedBlock is a function with the following parameters:

The Function needs to return a boolean, that is true if the blockBreaking process is successfull, and false if it ain't.