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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def cell_to_text(self):
 """Return the text representation of a cell"""

        if self.cell_type == 'markdown':
            # Is an explicit region required?
            if self.metadata or self.cell_reader(self.fmt).read(self.source)[1] < len(self.source):
                if self.metadata:
                    region_start = ['<!-- #region']
                    if 'title' in self.metadata and '{' not in self.metadata['title']:
                        region_start.append(self.metadata.pop('title'))
                    region_start.append(json.dumps(self.metadata))
                    region_start.append('-->')
                    region_start = ' '.join(region_start)
                else:
                    region_start = '<!-- #region -->'

                return [region_start] + self.source + ['<!-- #endregion -->']
            return self.source

        return self.code_to_text()