Support google.api_core.retry in googleapiclient.discovery.build? #2688

It looks like googleapiclient.discovery.build() is super limited wrt to retry support is that correct?

In general is googleapiclient.discovery.build for legacy clients or APIs that Google doesn't support as fully? Some APIs use it and others have a specific library I can import and use google.api_core.retry with.

Retry has exponential backoff built into it, a bunch of sane defaults, and other features.

I generally just set a timeout value and let it use the default backoff settings which is so simple and effective for 99% of use cases I find.

Could the service client just support a Retry like this?

from googleapiclient.discovery import (build)
from google.api_core.retry import Retry

my_retry = Retry(timeout=30)
service = build("admin", "directory_v1", retry=my_retry)