from trytond.pool import Pool, PoolMeta

class Cron(metaclass=PoolMeta):
    __name__ = 'ir.cron'

    @classmethod
    def __setup__(cls):
        super().__setup__()
        cls.method.selection.extend([
                ('crm.opportunity.validation.history|table_query_consult',
                    "Prueba")
                ])