Github user joehni commented on the pull request:
https://github.com/apache/commons-lang/pull/102#issuecomment-118259555
It does! Binary compatibility means, that you can take the new jar file and
replace it in an existing project without recompile the sources. This is what
Apache Common promises for its components. Therefore is is *not* possible to
remove those methods, because existing classes will call the methods with the
single argument and will break badly if it is missing.
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