code: def test_fold_optimization_cbind():
      assert (
          h2o.is_expr_optimizations_enabled()
      ), "Expression optimization needs to be enabled"
  
      data = single_column_frame()
      data = data.cbind(data).cbind(data).cbind(data)
  
      expr = data._ex
      assert expr._op == "cbind"
      assert len(expr._children) == 4
  
file_path: h2o-3/h2o-py/tests/testdir_misc/pyunit_expr_optimizations.py
imports: import h2o
  import sys
  from tests import pyunit_utils
  from h2o import H2OFrame
  from h2o.expr import ExprNode
label_desc: Use image node_id 6 for calling a global function with example usage: test_fold_optimization_cbind() without return types