function getSyntheticExports (synthetic) {
    if (synthetic === true) {
        synthetic = 'default';
    }

    return `if (__m__.exports.${synthetic}) {
        for (let prop in __m__.exports.${synthetic}) {
            prop !== '${synthetic}' && !__m__.exports.hasOwnProperty(prop) && __e__(prop, function () { return __m__.exports.${synthetic}[prop] });
        }
    }`
}
@param {boolean|string} synthetic 
@return {string}