in src/common/modulemapper.js [31:39]
function addEntry (strategy, moduleName, symbolPath, opt_deprecationMessage) {
if (!(moduleName in moduleMap)) {
throw new Error('Module ' + moduleName + ' does not exist.');
}
symbolList.push(strategy, moduleName, symbolPath);
if (opt_deprecationMessage) {
deprecationMap[symbolPath] = opt_deprecationMessage;
}
}