* Find the foreignkey associated to the current relationship
        * Get its title
        * Remove this fkey field from the export

        :param dict main_infos: The datas collected about the relationship
        :param obj prop: The property mapper of the relationship
        :param list result: The actual collected headers
        :returns: a title

def _merge_many_to_one_field(self, main_infos, prop, result):
        """
        * Find the foreignkey associated to the current relationship
        * Get its title
        * Remove this fkey field from the export

        :param dict main_infos: The datas collected about the relationship
        :param obj prop: The property mapper of the relationship
        :param list result: The actual collected headers
        :returns: a title
        """
        title = None
        # We first find the related foreignkey to get the good title
        rel_base = list(prop.local_columns)[0]
        related_fkey_name = rel_base.name
        if not main_infos.get('keep_key', False):
            for val in result:
                if val['name'] == related_fkey_name:
                    title = val['label']
                    main_infos['label'] = title
                    result.remove(val)
                    break

        return main_infos