class_docstr: Custom mutation or recombination operation
  This is an experimental API
  
  Call on a Parameter to create a new Parameter with the
  provided mutation/recombination.
code: def root(self) -> core.Parameter:
      param = self._layers[0]
      self._check_type(param)
      return param
  
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 1 for calling the Mutation obj's underlying member method code with example usage: obj.root() and returns: param