@property
    def blip_rId(self):
        blip = self.blipFill.blip
        if blip is not None and blip.rEmbed is not None:
            return blip.rEmbed
        raise ValueError('no embedded image')
Value of `p:blipFill/a:blip/@r:embed`. Raises |ValueError| if not
dataset/ETHPy150Open scanny/python-pptx/pptx/oxml/shapes/picture.py/CT_Picture.blip_rId