Google::Cloud::DocumentAI::V1: uninitialized constant GRPC::Core::Channel when setting credentials in DocumentProcessorService::Client.configure block

[jibiel]

Environment details

• Ruby version: 3.4.2
• Gem name and version: google-cloud-document_ai-v1 1.4.0

Steps to reproduce

1. Set credentials in the Google::Cloud::DocumentAI::V1::DocumentProcessorService::Client.configure block.

Code example

Google::Cloud::DocumentAI::V1::DocumentProcessorService::Client.configure do |config|
  config.credentials = {} # ...
end

Full backtrace

~/gems/ruby-3.4.2@gemset/gems/google-cloud-document_ai-v1-1.4.0/lib/google/cloud/document_ai/v1/document_processor_service/client.rb:2507:in 'block in <class:Configuration>': uninitialized constant GRPC::Core::Channel (NameError)

                allowed += [::GRPC::Core::Channel, ::GRPC::Core::ChannelCredentials] if defined? ::GRPC
                                        ^^^^^^^^^
	from ~/gems/ruby-3.4.2@gemset/gems/gapic-common-0.25.0/lib/gapic/config.rb:84:in 'block in Google::Cloud::DocumentAI::V1::DocumentProcessorService::Client::Configuration#create_setter'
	from ~/gems/ruby-3.4.2@gemset/gems/google-cloud-document_ai-v1-1.4.0/lib/google/cloud/document_ai/v1/document_processor_service/client.rb:94:in 'Google::Cloud::DocumentAI::V1::DocumentProcessorService::Client.configure'

Additional information

grpc 1.70.1 doesn't have these constants:

> ls GRPC::Core
constants: StatusCodes
Zeitwerk::ConstAdded#methods: const_added

Providing credentials in the Google::Cloud::DocumentAI#configure doesn't work either (google-cloud-document_ai 2.0.0, behaves like credentials are missing altogether). Only works when credentials are provided directly when initializing a client instance:

Google::Cloud::DocumentAI::V1::DocumentProcessorService::Client.new do |config|
  config.credentials = {} # ...
end