How to use the unidiff.constants.LINE_TYPE_NO_NEWLINE function in unidiff

def _add_no_newline_marker_to_last_hunk(self):
        if not self:
            raise UnidiffParseError(
                'Unexpected marker:' + LINE_VALUE_NO_NEWLINE)
        last_hunk = self[-1]
        last_hunk.append(
            Line(LINE_VALUE_NO_NEWLINE + '\n', line_type=LINE_TYPE_NO_NEWLINE))

if normalized_line != file_lines[line_cursor]:
                    raise _PatchValidationError(
                        "Line '{}' does not match removal line '{}' from patch".format(
                            file_lines[line_cursor], normalized_line))
                del file_lines[line_cursor]
            elif line.is_context:
                if not normalized_line and line_cursor == len(file_lines):
                    # We reached the end of the file
                    break
                if normalized_line != file_lines[line_cursor]:
                    raise _PatchValidationError(
                        "Line '{}' does not match context line '{}' from patch".format(
                            file_lines[line_cursor], normalized_line))
                line_cursor += 1
            else:
                assert line.line_type in (LINE_TYPE_EMPTY, LINE_TYPE_NO_NEWLINE)

if line_type == LINE_TYPE_EMPTY:
                line_type = LINE_TYPE_CONTEXT
            value = valid_line.group('value')
            original_line = Line(value, line_type=line_type)
            if line_type == LINE_TYPE_ADDED:
                original_line.target_line_no = target_line_no
                target_line_no += 1
            elif line_type == LINE_TYPE_REMOVED:
                original_line.source_line_no = source_line_no
                source_line_no += 1
            elif line_type == LINE_TYPE_CONTEXT:
                original_line.target_line_no = target_line_no
                target_line_no += 1
                original_line.source_line_no = source_line_no
                source_line_no += 1
            elif line_type == LINE_TYPE_NO_NEWLINE:
                pass
            else:
                original_line = None

            # stop parsing if we got past expected number of lines
            if (source_line_no > expected_source_end or
                    target_line_no > expected_target_end):
                raise UnidiffParseError('Hunk is longer than expected')

            if original_line:
                original_line.diff_line_no = diff_line_no
                hunk.append(original_line)

            # if hunk source/target lengths are ok, hunk is complete
            if (source_line_no == expected_source_end and
                    target_line_no == expected_target_end):