I can't find the def _get_report_values() for the report  "stock.report_delivery_document." 

I wanted to inherit  the model and add my custom fields to customize the report but I tried inheriting: "report.stock.stock_rule", "report.stock.report_reception" and  "report.stock.label_product_product_view" models and adding a log in my terminal but it doesn't call my overridden model. 

My /models dir has an __init__ as well as the main dir. So it does call the inherit  i created.

This is how i inherit the models i have mentioned:

class StockReport(models.AbstractModel):

    _inherit = 'report.stock.report_reception'

    def _get_report_values(self, docids, data=None):

        res = super(StockReport, self)._get_report_values(docids, data)

        print('INFO: THIS IS THE INHERITED REPORT')

        # return res

Can someone help me please? Thank you