code: def get_layer_with_annotation() -> AnnotationLayer:
      return (
          db.session.query(AnnotationLayer)
          .filter(AnnotationLayer.name == "layer_with_annotations")
          .one_or_none()
      )
  
imports: import json
  import pytest
  import prison
  from sqlalchemy.sql import func
  import tests.integration_tests.test_app
  from superset import db
  from superset.models.annotations import Annotation, AnnotationLayer
  from tests.integration_tests.base_tests import SupersetTestCase
  from tests.integration_tests.annotation_layers.fixtures import create_annotation_layers, get_end_dttm, get_start_dttm
  from tests.unit_tests.annotation_layers.fixtures import START_STR, END_STR
label_desc: Use image node_id 1 for calling the TestAnnotationLayerApi obj's underlying member method code with example usage: obj.get_layer_with_annotation() and returns: db