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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def store_pulse_pushes(body, exchange, routing_key):
 """ Fetches the pushes pending from pulse exchanges and loads them. """

    newrelic.agent.add_custom_parameter("exchange", exchange)
    newrelic.agent.add_custom_parameter("routing_key", routing_key)

    PushLoader().process(body, exchange)