code: def _n_unique_strings(self, n):
      seen = set([None])
      return [
          self._unique_string(seen, avg_options=3, p_suffix=0.4)
          for _ in range(n)
      ]
  
imports: import argparse
  import contextlib
  import os
  import random
  import sys
  import ninja_syntax
label_desc: Use image node_id 3 for calling the GenRandom obj's underlying member method code with example usage: obj._n_unique_strings(n) and returns: unknown