def contour(
    x: np.ndarray, y: np.ndarray, z: np.ndarray, ax: Axes, **kwargs: Any
) -> QuadContourSet:
    """
    Contour plot of 2D DataArray.

    Wraps :py:func:`matplotlib:matplotlib.pyplot.contour`.
    """
    primitive = ax.contour(x, y, z, **kwargs)
    return primitive

    Contour plot of 2D DataArray.

    Wraps :py:func:`matplotlib:matplotlib.pyplot.contour`.
    
xarray/plot/dataarray_plot.py