'Returns a page of :class:`UsageTrigger` resources as a list. For paging
information see :class:`ListResource`
:param recurring: Only show UsageTriggers that count over this
interval. One of daily, monthly, or yearly. To
retrieve non-recurring triggers, leave this empty or
use alltime.
:param usage_category: Only show UsageTriggers that watch this usage
category. Must be one of the supported usage
categories.
:trigger_by: Only show UsageTriggers that trigger by this field in the
UsageRecord. Must be one of: count, usage, or price as
described in the UsageRecords documentation.'

def list(self, **kwargs):

    return self.get_instances(kwargs)
