def METHOD_NAME(self, im, box=None):
    """
    Paste a PIL image into the bitmap image.
    :param im: A PIL image.  The size must match the target region.
               If the mode does not match, the image is converted to the
               mode of the bitmap image.
    :param box: A 4-tuple defining the left, upper, right, and
                lower pixel coordinate.  See :ref:`coordinate-system`. If
                None is given instead of a tuple, all of the image is
                assumed.
    """
    im.load()
    if self.mode != im.mode:
        im = im.convert(self.mode)
    if box:
        self.image.METHOD_NAME(im.im, box)
    else:
        self.image.METHOD_NAME(im.im)