docs: def CreateSnapshot(self,delete_existing=True,expiration_days=7):
  		"""Take a Hypervisor level snapshot retained for between 1 and 10 days (7 is default).
  		Currently only one snapshop may exist at a time, thus will delete snapshots if one already
  		exists before taking this snapshot.
  
  		>>> clc.v2.Server("WA1BTDIAPI219").CreateSnapshot(2)
  		<clc.APIv2.queue.Requests object at 0x10d106cd0>
  		>>> _.WaitUntilComplete()
  		0
  
  		"""
  
  		if len(self.data['details']['snapshots']):
  			if delete_existing:  self.DeleteSnapshot()
  			else:  raise(clc.CLCException("Snapshot already exists cannot take another"))
  
  		return(clc.v2.Requests(clc.v2.API.Call('POST','operations/%s/servers/createSnapshot' % (self.alias),
  											   {'serverIds': self.id, 'snapshotExpirationDays': expiration_days},
  											   session=self.session),
  							   alias=self.alias,
  							   session=self.session))