code: def get_groupable_matrix2():
      mt = hl.utils.range_matrix_table(4, 4)
      mt = mt.annotate_globals(glob=5)
      mt = mt.annotate_rows(r1=3)
      mt = mt.annotate_cols(c1=3)
  
      mt2 = hl.utils.range_matrix_table(4, 4)
      mt2 = mt2.annotate_entries(x=mt2.row_idx + mt2.col_idx)
      mt2 = mt2.annotate_rows(row_idx2=mt2.row_idx)
      mt2 = mt2.annotate_cols(col_idx2=mt2.col_idx)
      mt2 = mt2.annotate_globals(global_field=6)
      return mt, mt2
  
file_path: hail/hail/python/test/hail/matrixtable/test_grouped_matrix_table.py
imports: import unittest
  import hail
  from ..helpers import *
label_desc: Use image node_id 2 for calling the Tests obj's underlying member method code with example usage: obj.get_groupable_matrix2() and returns: mt,  mt2