code: def aggregate(self, func):
      from .aggregation import DataFrameEwmAgg
  
      params = self.params
      params["alpha_ignore_na"] = params.pop("ignore_na", False)
      params["validate_columns"] = False
      op = DataFrameEwmAgg(func=func, **params)
      return op(self)
  
imports: import math
  from collections import OrderedDict
  from ....serialization.serializables import Int64Field, BoolField, Int32Field, Float64Field, StringField
  from ....utils import pd_release_version
  from ...utils import validate_axis
  from ..core import Window
label_desc: Use image node_id 12 for calling the EWM obj's underlying member method code with example usage: obj.aggregate(func) and returns: op