Copyright 2020, chenshichao
Licensed under the Apache License, Version 2.0 (the "License");
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由于ims_kula作为一个通用的IMS SDK，所以是一个单独的git项目，以submodule方式引用，所以大家在clone KulaChat项目的时候，需要把submodule也同时clone下来，完整的git命令：git clone --recurse-submodules https://github.com/FreddyChen/KulaChat.git