Create a :py:class:`Buffer` object.

            Args:
                data (bytes): Content of the new buffer.

            Keyword Args:
                reserve (int): The number of bytes to reserve.
                dynamic (bool): Treat buffer as dynamic.

            Returns:
                :py:class:`Buffer` object

def buffer(self, data=None, *, reserve=0, dynamic=False) -> Buffer:
        '''
            Create a :py:class:`Buffer` object.

            Args:
                data (bytes): Content of the new buffer.

            Keyword Args:
                reserve (int): The number of bytes to reserve.
                dynamic (bool): Treat buffer as dynamic.

            Returns:
                :py:class:`Buffer` object
        '''

        if type(reserve) is str:
            reserve = mgl.strsize(reserve)

        res = Buffer.__new__(Buffer)
        res.mglo, res._size, res._glo = self.mglo.buffer(data, reserve, dynamic)
        res._dynamic = dynamic
        res.ctx = self
        res.extra = None
        return res