code: def __getitem__(self, item):
      return self.properties[item]
  
file_path: hail/hail/python/hail/ggplot/aes.py
imports: from collections.abc import Mapping
  from hail.expr import Expression
  from hail import literal
label_desc: Use image node_id 2 for calling the Aesthetic obj's underlying member method code with example usage: obj.__getitem__(item) and returns: self