The generated proto list has unneeded common protos which is in gax, but not in the generator. So including those set of protos like google.api.annotations.proto will give the below error.

UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, open 'protos/google/api/annotations.proto'

It’s because that the api depends on other apis which have different paths so that the commonprefix which is used to filter the protos is incorrect.

use case: nodejs-asset, nodejs-containeranalysis.