code: def test_head(self):
      pdf, psdf = self.df_pair
  
      self.assert_eq(psdf.head(2), pdf.head(2))
      self.assert_eq(psdf.head(3), pdf.head(3))
      self.assert_eq(psdf.head(0), pdf.head(0))
      self.assert_eq(psdf.head(-3), pdf.head(-3))
      self.assert_eq(psdf.head(-10), pdf.head(-10))
      with option_context("compute.ordered_head", True):
          self.assert_eq(psdf.head(), pdf.head())
  
imports: import unittest
  import numpy
  import pandas
  from pyspark import pandas
  from pyspark.pandas.config import option_context
  from pyspark.testing.pandasutils import ComparisonTestBase
  from pyspark.testing.sqlutils import SQLTestUtils
label_desc: Use image node_id 3 for calling the FrameIndexingMixin obj's underlying member method code with example usage: obj.test_head() without return types