Each metric must have its own filters copy to modify it freely

def __get_metrics(self):
        """ Each metric must have its own filters copy to modify it freely"""
        esfilters_merge = None
        esfilters_abandon = None
        esfilters_submit = None
        if self.esfilters:
            esfilters_merge = self.esfilters.copy()
            esfilters_abandon = self.esfilters.copy()
            esfilters_submit = self.esfilters.copy()

        merged = Merged(self.es_url, self.es_index,
                        start=self.start, end=self.end,
                        esfilters=esfilters_merge, interval=self.interval)
        # For BMI we need when the ticket was closed
        merged.FIELD_DATE = 'closed'

        abandoned = Abandoned(self.es_url, self.es_index,
                              start=self.start, end=self.end,
                              esfilters=esfilters_abandon, interval=self.interval)
        # For BMI we need when the ticket was closed
        abandoned.FIELD_DATE = 'closed'

        submitted = Submitted(self.es_url, self.es_index,
                              start=self.start, end=self.end,
                              esfilters=esfilters_submit,
                              interval=self.interval)

        return (merged, abandoned, submitted)