def process_module(self, node):
        """process a module

        the module's content is accessible via node.stream() function
        """
        with node.stream() as stream:
            for (lineno, line) in enumerate(stream):
                if line.rstrip().endswith("\\"):
                    self.add_message("backslash-line-continuation", line=lineno)
process a module

        the module's content is accessible via node.stream() function