class_docstr: Perform a column operation. If inplace is True, then cbind the result onto original frame,
  otherwise, perform the operation in place.
class_docstr_tok: ["Perform","a","column","operation",".","If","inplace","is","True",",","then","cbind","the","result","onto","original","frame",",","otherwise",",","perform","the","operation","in","place","."]
code: def to_rest(self, step_name):
      ast = self._transform_helper(self._dummy_frame())._ex._to_string()
      new_col_names = self.new_col_name
      if new_col_names is None:
          new_col_names = ["|"]
      elif not isinstance(new_col_names, (list, tuple)):
          new_col_names = [new_col_names]
      return super(H2OColOp, self).to_rest(
          [
              step_name,
              self.__class__.__name__,
              ast,
              self.inplace,
              "|".join(new_col_names),
          ]
      )
  
imports: import warnings
  from .transform_base import H2OTransformer
label_desc: Use image node_id 5 for calling the H2OColOp obj's underlying member method code with example usage: obj.to_rest(step_name) and returns: super