! @brief Searches for a flash algo covering the regions's address range.

def _find_matching_algo(self, region):
        """! @brief Searches for a flash algo covering the regions's address range.'"""
        for algo in self._info.algos:
            # Both start and size are required attributes.
            algoStart = int(algo.attrib['start'], base=0)
            algoSize = int(algo.attrib['size'], base=0)
            algoEnd = algoStart + algoSize - 1
        
            # Check if the region indicated by start..size fits within the algo.
            if (algoStart <= region.start <= algoEnd) and (algoStart <= region.end <= algoEnd):
                return algo
        return None