def check (self, sourceImage, computedFilename, outputConfig):

        # if we haven't already stated this file, stat this file
        if sourceImage not in self.modData:
            self.modData[sourceImage] = os.stat(sourceImage).st_mtime

        srcModTime = self.modData[sourceImage]
        try:
            destModTime = os.stat(computedFilename).st_mtime
        except Exception:
            destModTime = 0
        if srcModTime > destModTime:
            return True
        else:
            return False
returns true if the source file has a greater modification date than
dataset/ETHPy150Open rf/renderizer/plugin.py/ModCheck.check