def METHOD_NAME(self):
    return """\
    color
        Sets the final color of the gradient fill: the center
        color for radial, the right for horizontal, or the
        bottom for vertical.
    colorsrc
        Sets the source reference on Chart Studio Cloud for
        `color`.
    type
        Sets the type of gradient used to fill the markers
    typesrc
        Sets the source reference on Chart Studio Cloud for
        `type`.
    """