onESMLateInitFound (filePath, node, found) {
        let { output, code } = activeModules[filePath];
        let transpiled = ';' + found.map(name => `__e__('${name}', function () { return typeof ${name} !== 'undefined' && ${name} })`).join(';') + ';';
        output.appendRight(node.end, transpiled);
    }
@param {ESTree} node 
@param {string[]} found