code: def na_value(dtype):
      """
      The scalar missing value for this type. Default dtype.na_value.
  
      TODO: can be removed in 3.x (see https://github.com/pandas-dev/pandas/pull/54930)
      """
      return dtype.na_value
  
imports: import operator
  import pytest
  from pandas._config.config import _get_option
  from pandas import Series, options
label_desc: Use image node_id 10 for calling a global function with example usage: na_value(dtype) and returns: dtype