[typescript-angular] useSingleRequestParameter is ignored

Description

I found the info about the config parameter useSingleRequestParameter in this docs: https://openapi-generator.tech/docs/generators/typescript-angular/

I expect, that I can call the service functions in the generated api with something like:

myService.get_whatever({ mandatory_1: 1, optional_2: 2 })

instead of

myService.get_whatever(1, undefined, 2 })

But the parameter is ignored. No code change no matter if I add it or not.

I compile the api with this code

docker run --rm \
	--network="host" \
	-v ${PWD}:/local swaggerapi/swagger-codegen-cli generate \
	-i http://my-project.test:8000/api/swagger.json \
	-l typescript-angular \
	-o /local/services/myservice/src/api \
	--additional-properties=useSingleRequestParameter=true

Swagger-codegen version

swaggerapi/swagger-codegen-cli:2.4.17

Command line used for generation

docker run --rm \
	--network="host" \
	-v ${PWD}:/local swaggerapi/swagger-codegen-cli generate \
	-i http://my-project.test:8000/api/swagger.json \
	-l typescript-angular \
	-o /local/services/myservice/src/api \
	--additional-properties=useSingleRequestParameter=true

Reproduce the issue with the documented typescript-angular generator and the provided Docker command using swaggerapi/swagger-codegen-cli:2.4.17. Inspect the generator and its templates to determine why useSingleRequestParameter does not affect generated service signatures; done means the generated methods accept one parameter object when the option is enabled and retain the existing form otherwise.