code: def _build_aggregation(self, size: int = None) -> Dict[str, Any]:
      return aggregations.bidimentional_terms_aggregations(
          field_name_x=self.field_x,
          field_name_y=self.field_y,
          size=size,
      )
  
imports: import dataclasses
  import logging
  from typing import TYPE_CHECKING, Any, Dict, List, Optional, Union
  from argilla.server.daos.backend.query_helpers import aggregations
  from argilla.server.helpers import unflatten_dict
label_desc: Use image node_id 1 for calling the BidimensionalTermsAggregation obj's underlying member method code with example usage: obj._build_aggregation(size) and returns: aggregations