class ModelWithDatetimeField(BaseModel):
        dt_field: datetime

        @field_serializer("dt_field")
        def serialize_datetime(self, dt_field: datetime):
            return dt_field.replace(microsecond=0, tzinfo=timezone.utc).isoformat()

    app = FastAPI()
    model = ModelWithDatetimeField(dt_field=datetime(2019, 1, 1, 8))

    @app.get("/model", response_model=ModelWithDatetimeField)

        class Config:
            pass

    model = ModelWithCustomEncoder(dt_field=datetime(2019, 1, 1, 8))
    assert jsonable_encoder(model) == {"dt_field": "2019-01-01T08:00:00+00:00"}
    subclass_model = ModelWithCustomEncoderSubclass(dt_field=datetime(2019, 1, 1, 8))
    assert jsonable_encoder(subclass_model) == {"dt_field": "2019-01-01T08:00:00+00:00"}


def test_encode_model_with_config():

                assertEquals("0", list.get(0).get(ID_FIELD));
                assertEquals("9", list.get(1).get(ID_FIELD));
                assertEquals("1", list.get(2).get(ID_FIELD));
                assertEquals("8", list.get(3).get(ID_FIELD));
                assertEquals("2", list.get(4).get(ID_FIELD));
                assertEquals("7", list.get(5).get(ID_FIELD));
                assertEquals("3", list.get(6).get(ID_FIELD));

import javassist.CtClass
import javassist.CtField

/**
 * Matches Kotlin <code>internal</code> members.
 */
class KotlinInternalFilter implements ClassFilter, FieldFilter, BehaviorFilter {

    @Override
    boolean matches(CtClass ctClass) {
        return KotlinMetadataQueries.INSTANCE.isKotlinInternal(ctClass)
    }

    @Override
    boolean matches(CtField ctField) {

              $context_receiver_0: GET_FIELD 'FIELD FIELD_FOR_CLASS_CONTEXT_RECEIVER name:contextReceiverField0 type:<root>.Ctx1 visibility:private [final] declared in <root>.Test' type=<root>.Ctx1 origin=null
                receiver: GET_VAR 'p0: <root>.Test declared in <root>.CodeFragment.run' type=<root>.Test origin=null

      chunk_metadata.chunks().begin(), chunk_metadata.chunks().end());

  FieldIndex field_one_field_tag;
  field_one_field_tag.set_field(1);
  FieldIndex repeated_field_field_tag;
  repeated_field_field_tag.set_field(2);
  FieldIndex repeated_field_index_field_tag;
  repeated_field_index_field_tag.set_index(1);
  RepeatedPtrField<FieldIndex> target_field_tags;

              $context_receiver_0: GET_FIELD 'FIELD FIELD_FOR_CLASS_CONTEXT_RECEIVER name:contextReceiverField0 type:<root>.Ctx1 visibility:private [final] declared in <root>.Test' type=<root>.Ctx1 origin=null
                receiver: GET_VAR 'p0: <root>.Test declared in <root>.CodeFragment.run' type=<root>.Test origin=null

                }
            }
        }

        if (member instanceof JApiField) {

            JApiField field = (JApiField) member
            CtField oldField = field.oldFieldOptional.get()
            CtField newField = field.newFieldOptional.get()

            def oldNullability = hasNullableAnnotation(oldField)
            def newNullability = hasNullableAnnotation(newField)

import gradlebuild.binarycompatibility.intValue
import gradlebuild.binarycompatibility.stringArrayValue
import gradlebuild.binarycompatibility.stringValue
import javassist.CtClass
import javassist.CtConstructor
import javassist.CtField
import javassist.CtMember
import javassist.CtMethod
import javassist.Modifier
import javassist.bytecode.annotation.Annotation
import javassist.bytecode.annotation.AnnotationImpl
import kotlinx.metadata.Flag

  // SavedModel.meta_graphs[0].graph_def
  FieldIndex meta_graph_field_tag;
  meta_graph_field_tag.set_field(2);
  FieldIndex meta_graph_index_field_tag;
  meta_graph_index_field_tag.set_index(0);
  FieldIndex graph_def_field_tag;
  graph_def_field_tag.set_field(2);
  RepeatedPtrField<FieldIndex> graph_def_field_tags;
  graph_def_field_tags.Add(FieldIndex(meta_graph_field_tag));