* dynamically call TypeToken.isSupertypeOf with Guava 19 and later and
TypeToken.isAssignableFrom with Guava 18 and earlier
* consume or ignore values from methods with CheckReturnValue
* replace usage of removed Iterators.emptyIterator
When using IAM a company can have internal-only projects, which are
referenced in the form <domain>:<project_id>. IAM account is in the
form: email@project_id.domain.tld.iam......