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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 create_firewall_policy(kwargs=None, call=None):
    '''
    Create a firewall policy
    '''
    if call == 'action':
        raise SaltCloudSystemExit(
            'The create_firewall_policy function must be called with '
            '-f or --function'
        )

    conn = get_conn()

    # Assemble the composite FirewallPolicy and FirewallPolicyRule[] objects.
    getFwpResult = _get_firewall_policy(kwargs)

    data = conn.create_firewall_policy(
        firewall_policy=getFwpResult['firewall_policy'],
        firewall_policy_rules=getFwpResult['firewall_policy_rules']
    )

    return {'FirewallPolicy': data}