<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def tokenize_paragraphs(self):
 """Apply paragraph tokenization to this Text instance. Creates ``paragraphs`` layer."""

        tok = self.__paragraph_tokenizer
        spans = tok.span_tokenize(self.text)
        dicts = []
        for start, end in spans:
            dicts.append({'start': start, 'end': end})
        self[PARAGRAPHS] = dicts
        return self