code: def _get_unique_name(self, f_name):
      if f_name in self._unique_name:
          self._unique_name[f_name] += 1
          return "{}_{}".format(f_name, self._unique_name[f_name])
      self._unique_name[f_name] = 0
      return f_name
  
file_path: nnabla/python/src/nnabla/utils/converter/nnablart/resolver.py
imports: from collections import OrderedDict
  import nnabla
  import nnabla.functions
  import numpy
  from nnabla.utils import nnabla_pb2
  from nnabla.utils.save_function import _create_function_nntxt
label_desc: Use image node_id 2 for calling the Resolver obj's underlying member method code with example usage: obj._get_unique_name(f_name) and returns: f_name, str