t: 0
            The position of the baseline, in *orientation*-coordinates.

        label : str, default: None
            The label to use for the stems in legends.

        orientation : {'x', 'y', 'z'}, default: 'z'
            The direction along which stems are drawn.

        data : indexable object, optional
            DATA_PARAMETER_PLACEHOLDER

        Returns
        -------
        `.StemContainer`
            The container may be treated like a tuple
            (*markerline*, *stemlines*, *baseline*)

        Examples
        --------
        .. plot:: gallery/mplot3d/stem3d_demo.py
        r