code: def time_read_uint64_neg_values(self, size):
      # mandatory rewind of StringIO object
      # between iterations of a repeat:
      np.loadtxt(self.data2)
      self.data2.seek(0)
  
imports: from .common import Benchmark, get_squares, get_squares_
  import numpy
  from io import SEEK_SET, StringIO, BytesIO
label_desc: Use image node_id 3 for calling the LoadtxtReadUint64Integers obj's underlying member method code with example usage: obj.time_read_uint64_neg_values(size) without return types