code: def dtype():
      return SparseDtype()
  
imports: import numpy
  import pytest
  from pandas.errors import PerformanceWarning
  import pandas
  from pandas import SparseDtype
  import pandas._testing
  from pandas.arrays import SparseArray
  from pandas.tests.extension import base
label_desc: Use image node_id 2 for calling a global function with example usage: dtype() and returns: SparseDtype