code: def get_sector_info(self, addr):
          
          assert self.region is not None
          if not self.region.contains_address(addr):
              return None
  
          info = SectorInfo()
          info.erase_weight = self.region.erase_sector_weight
          info.size = self.region.blocksize
          info.base_addr = addr - (addr % info.size)
          return info
docs: !
          @brief Get info about the sector that contains this address.