def _get_index(self):
return self.__index<EOL>
Getter method for index, mapped from YANG variable /interfaces/interface/subinterfaces/subinterface/state/index (uint32)

    YANG Description: The index of the subinterface, or logical interface number.
On systems with no support for subinterfaces, or not using
subinterfaces, this value should default to 0, i.e., the
default subinterface.