code: def yaml_serperdev_openapi_spec():
      serper_spec = """
              openapi: 3.0.0
              info:
                title: SerperDev
                version: 1.0.0
                description: API for performing search queries
              servers:
                - url: 'https://google.serper.dev'
              paths:
                /search:
                  post:
                    operationId: search
                    description: Search the web with Google
                    requestBody:
                      required: true
                      content:
                        application/json:
                          schema:
                            type: object
                            properties:
                              q:
                                type: string
                    responses:
                      '200':
                        description: Successful response
                        content:
                          application/json:
                            schema:
                              type: object
                              properties:
                                searchParameters:
                                  type: undefined
                                knowledgeGraph:
                                  type: undefined
                                answerBox:
                                  type: undefined
                                organic:
                                  type: undefined
                                topStories:
                                  type: undefined
                                peopleAlsoAsk:
                                  type: undefined
                                relatedSearches:
                                  type: undefined
                    security:
                      - apikey: []
              components:
                securitySchemes:
                  apikey:
                    type: apiKey
                    name: x-api-key
                    in: header
              """
      return serper_spec
  
file_path: haystack/test/components/converters/test_openapi_functions.py
imports: import json
  import sys
  import tempfile
  import pytest
  from haystack.components.converters import OpenAPIServiceToFunctions
  from haystack.dataclasses import ByteStream
label_desc: Use image node_id 2 for calling a global function with example usage: yaml_serperdev_openapi_spec() and returns: serper_spec