How to use the covimerage.logger.logger.debug function in covimerage

in_script = Script(fname)
                logger.debug('Parsing script %s', in_script)
                self.scripts.append(in_script)
                self.scripts_by_fname[fname] = in_script

                next_line = next(file_object)
                m = RE_SOURCED_TIMES.match(next_line)
                in_script.sourced_count = int(m.group(1))

                plnum += skip_to_count_header() + 1
                lnum = 0

            elif line.startswith('FUNCTION  '):
                func_name = line[10:-2]
                in_function = Function(name=func_name)
                logger.debug('Parsing function %s', in_function)
                while True:
                    next_line = next(file_object)
                    if not next_line:
                        break
                    plnum += 1
                    if next_line.startswith('count'):
                        break
                    if next_line.startswith('    Defined:'):
                        defined = next_line[13:]
                        fname, _, lnum = defined.rpartition(":")
                        # NOTE: fname may be a drive letter on Windows.
                        if len(fname) <= 1:
                            fname, _, lnum = defined.rpartition(' line ')
                        fname = os.path.expanduser(fname)
                        in_function.source = (self.scripts_by_fname[fname],
                                              int(lnum))

# Parse line 1 always, as a workaround for
                        # https://github.com/vim/vim/issues/2103.
                        in_script.parse_function(lnum, source_line)
                else:
                    if count is None:
                        if is_executable_line(source_line):
                            # Functions do not have continued lines, assume 0.
                            count = 0
                    line = Line(line=source_line, count=count,
                                total_time=total_time, self_time=self_time)
                    in_function.lines[lnum] = line

            elif line.startswith('SCRIPT  '):
                fname = line[8:]
                in_script = Script(fname)
                logger.debug('Parsing script %s', in_script)
                self.scripts.append(in_script)
                self.scripts_by_fname[fname] = in_script

                next_line = next(file_object)
                m = RE_SOURCED_TIMES.match(next_line)
                in_script.sourced_count = int(m.group(1))

                plnum += skip_to_count_header() + 1
                lnum = 0

            elif line.startswith('FUNCTION  '):
                func_name = line[10:-2]
                in_function = Function(name=func_name)
                logger.debug('Parsing function %s', in_function)
                while True:
                    next_line = next(file_object)