A missing parameter check

Hello, I'm studying the source code and wondering if there should be any parameter check here at [strip](https://github.com/antlr/stringtemplate4/blob/bb92568f7f0ce3d3bc115db567ad9067640cd6d1/src/org/stringtemplate/v4/misc/Misc.java#L67) or an exception in its signature? It's a public method and can be called from outside. I'm new here, and a quick glance into open issues shows no related discussions. If it is expected, feel free to close the issue. Thanks.