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040000 tree eea3fc6ec9fee9ff2a6ec1c2ecfdac69744a2681	basic
100644 blob 54bc21a10ac95be536a49b5d70b7e67732bb3a43	common.proto
040000 tree 2661f4f5ac4a49c372ccf724a53f3e544c452972	helloworld