code: def not_a_transform_input(feature):
      """
      Verifies transform inputs are not transform features or direct features of transform features
      Returns True if a transform primitive can stack on the feature, and False if it cannot.
      """
      primitive = _find_root_primitive(feature)
      return not isinstance(primitive, TransformPrimitive)
  
imports: import functools
  import logging
  import operator
  import warnings
  from collections import defaultdict
  from typing import Any, DefaultDict, Dict, List, Tuple, Type
  from woodwork.column_schema import ColumnSchema
  from woodwork.logical_types import Boolean, BooleanNullable
  from featuretools import primitives
  from featuretools.entityset.entityset import LTI_COLUMN_NAME
  from featuretools.entityset.relationship import RelationshipPath
  from featuretools.feature_base import AggregationFeature, DirectFeature, FeatureBase, GroupByTransformFeature, IdentityFeature, TransformFeature
  from featuretools.feature_base.cache import CacheType, feature_cache
  from featuretools.feature_base.utils import is_valid_input
  from featuretools.primitives.base import AggregationPrimitive, PrimitiveBase, TransformPrimitive
  from featuretools.primitives.options_utils import filter_groupby_matches_by_options, filter_matches_by_options, generate_all_primitive_options, ignore_dataframe_for_primitive
  from featuretools.utils.gen_utils import Library, camel_and_title_to_snake
label_desc: Use image node_id 2 for calling a global function with example usage: not_a_transform_input(feature) and returns: unknown