def cast(self, adr):
     '''Casts address from current type to requested address-type, eg AddressFeature -> AddressChange
     @param adr: Address being converted 
     @type adr: Address
     @return: Address cast to the self type
     '''
     return Address.clone(adr, self.get())
 def cast(self,adr):
     '''Casts address from current type to requested address-type, eg AddressFeature -> AddressChange
     @param adr: Address being converted 
     @type adr: Address
     @return: Address cast to the self type
     '''
     return Address.clone(adr, self.get())