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Diffstat (limited to 'vendor/google.golang.org/api/option/option.go')
-rw-r--r--vendor/google.golang.org/api/option/option.go3
1 files changed, 3 insertions, 0 deletions
diff --git a/vendor/google.golang.org/api/option/option.go b/vendor/google.golang.org/api/option/option.go
index ffbee32..c1499f9 100644
--- a/vendor/google.golang.org/api/option/option.go
+++ b/vendor/google.golang.org/api/option/option.go
@@ -153,6 +153,9 @@ func (w withGRPCConnectionPool) Apply(o *internal.DialSettings) {
// WithAPIKey returns a ClientOption that specifies an API key to be used
// as the basis for authentication.
+//
+// API Keys can only be used for JSON-over-HTTP APIs, including those under
+// the import path google.golang.org/api/....
func WithAPIKey(apiKey string) ClientOption {
return withAPIKey(apiKey)
}