code: def get_ccle_mrna_levels():
      
      if request.method == 'OPTIONS':
          return {}
      response = request.body.read().decode('utf-8')
      body = json.loads(response)
      gene_list = body.get('gene_list')
      cell_lines = body.get('cell_lines')
      mrna_amounts = cbio_client.get_ccle_mrna(gene_list, cell_lines)
      res = {'mrna_amounts': mrna_amounts}
      return res
docs: Get CCLE mRNA amounts using cBioClient