':returns: Whether or not these two functions are identical.'

@property
def probably_identical(self):

    if (len((self._unmatched_blocks_from_a | self._unmatched_blocks_from_b)) > 0):
        return False
    for (a, b) in self._block_matches:
        if (not self.blocks_probably_identical(a, b)):
            return False
    return True
