code: def full(self, external=False):
          '''Get the full image URL in respect with ``max_size``'''
          return self.fs.url(self.filename, external=external) if self.filename else Nonf full(self, external=False):
          '''Get the full image URL in respect with ``max_size``'''
          return self.fs.url(self.filename, external=external) if self.filename else None
docs: Get the full image URL in respect with ``max_size``