Hi, I noticed that ModelCoderRegistrar only includes 9 out of ~40 coders. May I know the rationale behind this decision?
https://github.com/apache/beam/blob/release-2.7.0/runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/ModelCoderRegistrar.java I think one consequence of the above configuration is that WireCoders.instantiateRunnerWireCoder cannot instantiate KV coders correctly, where VoidCoder (key coder) becomes LengthPrefixCoder(ByteArrayCoder). What is the appropriate way to get KvCoder<Void, T> from RunnerApi.Pipeline? Thanks, Shen
