References: google.golang.org/protobuf/internal/genid.FieldOptions_OptionRetention_enum

const google.golang.org/protobuf/internal/genid.FieldOptions_OptionRetention_enum_name

one use

	google.golang.org/protobuf/internal/genid (current package)
		descriptor_gen.go#L723: 	FieldOptions_OptionRetention_enum_name     = "OptionRetention"

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