code: def visit_column(self, clause):
      try:
          parentmapper = clause._annotations["parentmapper"]
      except KeyError as ke:
          raise UnevaluatableError(
              f"Cannot evaluate column: {clause}"
          ) from ke
  
      if self.target_cls and not issubclass(
          self.target_cls, parentmapper.class_
      ):
          raise UnevaluatableError(
              "Can't evaluate criteria against "
              f"alternate class {parentmapper.class_}"
          )
  
      parentmapper._check_configure()
  
      # we'd like to use "proxy_key" annotation to get the "key", however
      # in relationship primaryjoin cases proxy_key is sometimes deannotated
      # and sometimes apparently not present in the first place (?).
      # While I can stop it from being deannotated (though need to see if
      # this breaks other things), not sure right now  about cases where it's
      # not there in the first place.  can fix at some later point.
      # key = clause._annotations["proxy_key"]
  
      # for now, use the old way
      try:
          key = parentmapper._columntoproperty[clause].key
      except orm_exc.UnmappedColumnError as err:
          raise UnevaluatableError(
              f"Cannot evaluate expression: {err}"
          ) from err
  
      # note this used to fall back to a simple `getattr(obj, key)` evaluator
      # if impl was None; as of #8656, we ensure mappers are configured
      # so that impl is available
      impl = parentmapper.class_manager[key].impl
  
      def get_corresponding_attr(obj):
          if obj is None:
              return _NO_OBJECT
          state = inspect(obj)
          dict_ = state.dict
  
          value = impl.get(
              state, dict_, passive=PassiveFlag.PASSIVE_NO_FETCH
          )
          if value is LoaderCallableStatus.PASSIVE_NO_RESULT:
              return _EXPIRED_OBJECT
          return value
  
      return get_corresponding_attr
  
imports: from __future__ import annotations
  from typing import Type
  from .None import exc
  from .base import LoaderCallableStatus
  from .base import PassiveFlag
  from ..None import exc
  from ..None import inspect
  from ..sql import and_
  from ..sql import operators
  from ..sql.sqltypes import Integer
  from ..sql.sqltypes import Numeric
  from ..util import warn_deprecated
label_desc: Use image node_id 7 for calling the _EvaluatorCompiler obj's underlying member method code with example usage: obj.visit_column(clause) and returns: get_corresponding_attr, value, _NO_OBJECT, _EXPIRED_OBJECT