function backgroundHandler(ele, { color, shape }) {
    const imageClass = CLASS_NAME_PREFEX + 'image';
    const shapeClass = CLASS_NAME_PREFEX + shape;
    const rule = `{
    background: ${color} !important;
  }`;
    
    addStyle(`.${imageClass}`, rule);

    shapeStyle(shape);

    addClassName(ele, [imageClass, shapeClass]);
  }
use the same config options as image block.