fix: #20878 Provide " as member" where needed #400

Job	Run time
Test Python client (3.8, samples/openapi3/client/petstore/python)	50s
Test Python client (3.9, samples/openapi3/client/petstore/python-aiohttp)	51s
Test Python client (3.11, samples/openapi3/client/petstore/python)	47s
Test Python client (3.10, samples/openapi3/client/petstore/python-aiohttp)	51s
Test Python client (3.11, samples/openapi3/client/petstore/python-aiohttp)	50s
Test Python client (3.10, samples/openapi3/client/petstore/python)	52s
Test Python client (3.12, samples/openapi3/client/petstore/python)	43s
Test Python client (3.8, samples/openapi3/client/petstore/python-aiohttp)	57s
Test Python client (3.12, samples/openapi3/client/petstore/python-aiohttp)	45s
Test Python client (3.9, samples/openapi3/client/petstore/python)	54s
Test Python client (3.12, samples/openapi3/client/petstore/python)	48s
Test Python client (3.11, samples/openapi3/client/petstore/python)	44s
Test Python client (3.8, samples/openapi3/client/petstore/python)	48s
Test Python client (3.10, samples/openapi3/client/petstore/python)	52s
Test Python client (3.9, samples/openapi3/client/petstore/python-aiohttp)	51s
Test Python client (3.8, samples/openapi3/client/petstore/python-aiohttp)	57s
Test Python client (3.12, samples/openapi3/client/petstore/python-aiohttp)	45s
Test Python client (3.9, samples/openapi3/client/petstore/python)	54s
Test Python client (3.10, samples/openapi3/client/petstore/python-aiohttp)	51s
Test Python client (3.11, samples/openapi3/client/petstore/python-aiohttp)	50s
	16m 40s

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