class_docstr: Selects one of the provided mutation based on a Choice subparameter
  Caution: there may be subparameter collisions
code: def _on_layer_added(self) -> None:
      root = self.root()
      for mut in self.mutations:
          root.add_layer(mut)
      self.mutations = []
      super()._on_layer_added()
  
imports: import typing
  import numpy
  from .None import core
  from .None import transforms
  from .data import Data, Scalar
  from .choice import Choice
  from .None import _layering
label_desc: Use image node_id 2 for calling the MutationChoice obj's underlying member method code with example usage: obj._on_layer_added() without return types