New method, mimetype to extension.
New method, mimetype to extension.

This is an acceptable counterpart to the extension to mimetype function.

nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus