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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _validate_jp2h(self, boxes):
 """Validate the JP2 Header box."""

        self._check_jp2h_child_boxes(boxes, 'top-level')

        jp2h_lst = [box for box in boxes if box.box_id == 'jp2h']
        jp2h = jp2h_lst[0]

        # 1st jp2 header box cannot be empty.
        if len(jp2h.box) == 0:
            msg = "The JP2 header superbox cannot be empty."
            raise IOError(msg)

        # 1st jp2 header box must be ihdr
        if jp2h.box[0].box_id != 'ihdr':
            msg = ("The first box in the jp2 header box must be the image "
                   "header box.")
            raise IOError(msg)

        # colr must be present in jp2 header box.
        colr_lst = [j for (j, box) in enumerate(jp2h.box)
                    if box.box_id == 'colr']
        if len(colr_lst) == 0:
            msg = "The jp2 header box must contain a color definition box."
            raise IOError(msg)
        colr = jp2h.box[colr_lst[0]]

        self._validate_channel_definition(jp2h, colr)