code: def closed(self):
      return self._closed
  
file_path: cudf/python/cudf/cudf/core/column/interval.py
imports: from typing import Optional
  import pandas
  import pyarrow
  import cudf
  from cudf.core.column import StructColumn
  from cudf.core.dtypes import CategoricalDtype, IntervalDtype
label_desc: Use image node_id 2 for calling the IntervalColumn obj's underlying member method code with example usage: obj.closed() and returns: self