code: def remove_rows_3_and_4(df):
      """Helper function to mutate dataframe by removing rows."""
      df = df.drop(3, axis=0)
      df = df.drop(4, axis=0)
      return df
  
file_path: pyjanitor/tests/functions/test_also.py
imports: from unittest.mock import Mock
  import pytest
label_desc: Use image node_id 2 for calling a global function with example usage: remove_rows_3_and_4(df) and returns: df