class_docstr: A dictionary that applies an arbitrary key-altering function
  before accessing the keys.
class_docstr_tok: ["A","dictionary","that","applies","an","arbitrary","key-altering","function","before","accessing","the","keys","."]
code: def keys(self):
      return self._keys(self, "")
  
imports: from typing import Optional, Any
label_desc: Use image node_id 7 for calling the NestedBlobsDict obj's underlying member method code with example usage: obj.keys() and returns: self