code: def aggregate(self, major_metrics_dict: Dict[str, float]):
      return np.mean([x for x in major_metrics_dict.values()])
  
imports: import abc
  import numexpr
  import numpy
  from typing import Union, Optional, Dict
label_desc: Use image node_id 1 for calling the EqualMetricAggregator obj's underlying member method code with example usage: obj.aggregate(major_metrics_dict) and returns: np