040000 tree ed30099c1eb47eea04f7ea48001cf1db2a7dd347	csharp
100644 blob dc16292c8511053a7c22838b6b12ce52678ab404	field_presence.md
100644 blob 73f21a382984678f59256f347e193af5ebca0b17	implementing_proto3_presence.md
100644 blob 361216f1bde451af5832f21eabb466e168a2f908	options.md
100644 blob 8734c700c129e98f15e92c5a306fbee57ae94cb2	performance.md
100644 blob 7799e308a7afec06f410f6aa5ec3b48e1af8daa2	third_party.md