https://github.com/protocolbuffers/protobuf/blob/master/LICENSE
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====================================================================

https://github.com/antlr/antlr4/blob/master/LICENSE.txt
[The "BSD 3-clause license"]
Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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 1. Redistributions of source code must retain the above copyright
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=====

MIT License for codepointat.js from https://git.io/codepointat
MIT License for fromcodepoint.js from https://git.io/vDW1m

Copyright Mathias Bynens <https://mathiasbynens.be/>

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