function initProps(el, props, animatableModel, dataIndex, cb) {
    animateOrSetProps(false, el, props, animatableModel, dataIndex, cb);
}
@param {string} iconStr Support 'image://' or 'path://' or direct svg path.
@param {Object} [opt] Properties of `module:zrender/Element`, except `style`.
@param {Object} [rect] {x, y, width, height}
@return {module:zrender/Element} Icon path or image element.