packages/okam-build/lib/processor/template/transform/wx2swan/element.js
function transformExtNameElement(element) {
    let {attribs: attrs} = element;
    let src = attrs && attrs.src;

    if (src) {
        attrs.src = src.replace(/\.wxml$/i, '.swan');
    }
}
function transformExtNameElement(element) {
    let {attribs: attrs} = element;
    let src = attrs && attrs.src;

    if (src) {
        attrs.src = src.replace(/\.wxml$/i, '.swan');
    }
}
src 引入 后缀转换: import and inlcude

@param  {Object} element element