process To proccess the output filtering. Note we don't care in which encoding the source is given. It is recommended that the source be in UTF-8 and that the ouput be the same. Also note we don't care about the length of the source, nor do we care about the length of the output. See the "lazy design" principle in the beginning of this header file. One more thing: it should be possible for the OutputFilter to return the source as output
Implementation of the function is required in your Output Filter module.