code: def decreasing(self):
      return self._decreasing
  
imports: import numpy
  import pandas
  from ...None import opcodes
  from ...core import OutputType
  from ...core.operand import OperandStage
  from ...serialization.serializables import BoolField
  from ...tensor.core import TensorOrder
  from ...tensor.merge import TensorConcatenate
  from ..operands import DataFrameOperand, DataFrameOperandMixin
label_desc: Use image node_id 2 for calling the DataFrameCheckMonotonic obj's underlying member method code with example usage: obj.decreasing() and returns: self