class_docstr: A column composed of numerical data.
  
  This class encodes a standard interface for different types of columns
  containing numerical types of data. In particular, mathematical operations
  that make sense whether a column is integral or real, fixed or floating
  point, should be encoded here.
code: def _can_return_nan(self, skipna: Optional[bool] = None) -> bool:
      return not skipna and self.has_nulls()
  
imports: from __future__ import annotations
  from typing import Optional, cast
  import numpy
  import cudf
  from cudf import _lib
  from cudf._typing import ScalarLike
  from cudf.core.column import ColumnBase
  from cudf.core.missing import NA
  from cudf.core.mixins import Scannable
label_desc: Use image node_id 1 for calling the NumericalBaseColumn obj's underlying member method code with example usage: obj._can_return_nan(skipna) and returns: unknown