def _process_out_of_bounds(self, value, start, end):
        "Clips out of bounds values"
        if isinstance(value, np.datetime64):
            v = dt64_to_dt(value)
            if isinstance(start, (int, float)):
                start = convert_timestamp(start)
            if isinstance(end, (int, float)):
                end = convert_timestamp(end)
            s, e = start, end
            if isinstance(s, np.datetime64):
                s = dt64_to_dt(s)
            if isinstance(e, np.datetime64):
                e = dt64_to_dt(e)
        else:
            v, s, e = value, start, end

        if v < s:
            value = start
        elif v > e:
            value = end

        return value