class_docstr: Python descriptor object to control getting/setting `CumlArray` attributes
  on `Base` objects. See the Estimator Guide for an in depth guide.
code: def _get_meta(
      self, instance, throw_on_missing=False
  ) -> CumlArrayDescriptorMeta:
      if throw_on_missing:
          if self.name not in instance.__dict__:
              raise AttributeError()
  
      return instance.__dict__.setdefault(
          self.name, CumlArrayDescriptorMeta(input_type=None, values={})
      )
  
file_path: cuml/python/cuml/common/array_descriptor.py
imports: from dataclasses import dataclass, field
  from cuml.internals.array import CumlArray
  import cuml
  from cuml.internals.input_utils import input_to_cuml_array, determine_array_type
label_desc: Use image node_id 3 for calling the CumlArrayDescriptor obj's underlying member method code with example usage: obj._get_meta(instance, throw_on_missing) and returns: instance