There are three functions in stock_warehouse.py dedicated for initializing, creating and updating picking type values. Those are:

_create_or_update_sequences_and_picking_types(self)

and within;

_get_picking_type_update_values()

_get_picking_type_create_values(max_sequence)

Variables I don't want to initialize are: 

'in_type_id', 

'out_type_id',

'pack_type_id',

'pick_type_id',

'int_type_id',

Is there a way to override these functions when creating a new Warehouse? 

If possible without any further consequences. 

Thanks !