code: def ref_meshgrid(*x, ij_indexing):
      indexing = "ij" if ij_indexing else "xy"
      return np.meshgrid(*x, indexing=indexing)
  
imports: import pytest
  import numpy
  import nnabla
  import nnabla.functions
  from nbla_test_utils import list_context
label_desc: Use image node_id 1 for calling a global function with example usage: ref_meshgrid() and returns: np