      ClassLookupDict, get_field_kwargs, get_nested_relation_kwargs,
      get_relation_kwargs, get_url_kwargs
  )
  from rest_framework.utils.serializer_helpers import (
      BindingDict, BoundField, NestedBoundField, ReturnDict, ReturnList
  )
  from rest_framework.validators import (
      UniqueForDateValidator, UniqueForMonthValidator, UniqueForYearValidator,
      UniqueTogetherValidator
  )
 
</s>
    BindingDict, BoundField, JSONBoundField, NestedBoundField, ReturnDict,
    ReturnList
      ClassLookupDict, get_field_kwargs, get_nested_relation_kwargs,
      get_relation_kwargs, get_url_kwargs
  )
  from rest_framework.utils.serializer_helpers import (
    BindingDict, BoundField, JSONBoundField, NestedBoundField, ReturnDict,
    ReturnList
  )
  from rest_framework.validators import (
      UniqueForDateValidator, UniqueForMonthValidator, UniqueForYearValidator,
      UniqueTogetherValidator
  )
keep keep keep keep replace keep keep keep keep keep
 PoC Add JSONBoundField to serializers (Fixes #4999)

Per issue #4999, JSONFields are not rendered properly in the DRF
browsable API HTML forms.  This patch attempts to fix that behavior by
introducing a JSONBoundField helper similar to the NestedBoundField
helper.
rest_framework/serializers.py