in src/loader.ts [180:194]
function getFunctionModulePath(codeLocation: string): string | null {
try {
return require.resolve(codeLocation);
} catch (ex) {
// Ignore exception, this means the function was not found here.
}
try {
return require.resolve(codeLocation + '/function.js');
} catch (ex) {
// Ignore exception, this means the function was not found here.
}
return null;
}