code: def dtindex():
      dtindex = np.arange(5, dtype=np.int64) * 10**9 * 3600 * 24 * 32
      dtindex.flags.writeable = False
      return dtindex
  
file_path: pandas/pandas/tests/tslibs/test_fields.py
imports: import numpy
  import pytest
  from pandas._libs.tslibs import fields
  import pandas._testing
label_desc: Use image node_id 1 for calling a global function with example usage: dtindex() and returns: dtindex