These structs and funcs should not be used by the end consumer. Unexporting them prevents developer confusion and unintended usage, as well as cleans up our documentation
These are used to support some extended utilities to help with STS requests. Change-Id: Iafc145b06ca42374cfc2ac6572762a50bcf560f2 GitHub-Last-Rev: 3085fe5703 GitHub-Pull-Request: golang/oauth2#439 Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/259777 Trust: Cody Oss <codyoss@google.com> Run-TryBot: Cody Oss <codyoss@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Tyler Bui-Palsulich <tbp@google.com>
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