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

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

one use

	google.golang.org/protobuf/internal/genid (current package)
		descriptor_gen.go#L1107: 	FeatureSet_JsonFormat_enum_fullname = "google.protobuf.FeatureSet.JsonFormat"

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