class_docstr: Drops the given keys.
class_docstr_tok: ["Drops","the","given","keys","."]
code: def __call__(self, features: Features) -> Features:
      if not self.ignore_missing_features:
          for k in self.keys:
              if k not in features:
                  raise ValueError(
                      f"Could not drop features '{k}'. Available features:"
                      f" {list(features)}"
                  )
      return {k: v for k, v in features.items() if k not in self.keys}
  
imports: import abc
  import dataclasses
  from typing import Optional, Sequence, Tuple, Union
  from clu import preprocess_spec
  from scenic.projects.owl_vit.preprocessing import modalities
  from scenic.projects.owl_vit.preprocessing import transforms
  import tensorflow
label_desc: Use image node_id 1 for calling the Drop obj's underlying member method code with example usage: obj.__call__(features) and returns: unknown