code: def get_precomputes(self, mapping):
      return hl.struct()
  
imports: from typing import List
  import abc
  from pandas import DataFrame
  import pandas
  import hail
  from hail.utils.java import warning
  from .utils import should_use_scale_for_grouping
label_desc: Use image node_id 3 for calling the Stat obj's underlying member method code with example usage: obj.get_precomputes(mapping) and returns: hl