@Override
  public Object handle (TaskExecution aTask) {
    return FilenameUtils.getFullPathNoEndSeparator(aTask.getRequiredString("filename"));
  }
Gets the full path from a full filename, which is the prefix + path, and also excluding the final directory separator. 

This method will handle a file in either Unix or Windows format. The method is entirely text based, 
and returns the text before the last forward or backslash. 

@author Arik Cohen
@since May 6, 2018
src/main/java/com/creactiviti/piper/taskhandler/io/FilePath.java