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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 initialize_vthunder(a10_cfg, device_cfg, client):
 """Perform initialization of system-wide settings"""


    vth = a10_cfg.get_vthunder_config()
    initialize_interfaces(vth, device_cfg, client)
    initialize_dns(vth, device_cfg, client)
    initialize_licensing(vth, device_cfg, client)
    initialize_sflow(vth, device_cfg, client)