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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 pause(env, identifier):
 """Pauses an active virtual server."""


    vsi = SoftLayer.VSManager(env.client)
    vs_id = helpers.resolve_id(vsi.resolve_ids, identifier, 'VS')

    if not (env.skip_confirmations or
            formatting.confirm('This will pause the VS with id %s. Continue?'
                               % vs_id)):
        raise exceptions.CLIAbort('Aborted.')

    env.client['Virtual_Guest'].pause(id=vs_id)