ditsing/ruaft @ df79979c0803345deaf21c8169dba451c0f7a3b5

Jing Yang df79979c08 Add a type_hint() helper method.		%!s(int64=2) %!d(string=hai) anos
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src	df79979c08 Add a type_hint() helper method.	%!s(int64=2) %!d(string=hai) anos
Cargo.toml	d173e212bb Create an RPC interceptor and a sample test.	%!s(int64=3) %!d(string=hai) anos