code: def dropna(self):
      return self._dropna
  
imports: import pandas
  from ...None import opcodes
  from ...core import OutputType
  from ...config import options
  from ...serialization.serializables import BoolField
  from ...utils import lazy_import
  from ..arrays import ArrowListArray, ArrowListDtype
  from .core import DataFrameReductionOperand, DataFrameReductionMixin, CustomReduction
label_desc: Use image node_id 2 for calling the DataFrameNunique obj's underlying member method code with example usage: obj.dropna() and returns: self