'Generate a reference to each of the block-level content elements in
this cell, in the order they appear.'

def iter_block_items(self):

    block_item_tags = (qn(u'w:p'), qn(u'w:tbl'), qn(u'w:sdt'))
    for child in self:
        if (child.tag in block_item_tags):
            (yield child)
