How to use addResourceFile

I want to add localized content, use addResourceFile, but keep prompting Cannot read property 'path' of null

Code：
var languageResourceFile = myProj.addResourceFile("InfoPlist.strings");
if (languageResourceFile){
myProj.addToPbxResourcesBuildPhase(languageResourceFile);
myProj.addToPbxBuildFileSection(languageResourceFile);
fs.writeFileSync(projectPbxprojNamePath, myProj.writeSync());
}

Start with the addResourceFile call in the supplied code and reproduce the “Cannot read property 'path' of null” error while adding InfoPlist.strings. Trace the returned languageResourceFile through addToPbxResourcesBuildPhase and addToPbxBuildFileSection; done means localized content is added and projectPbxprojNamePath is written without the error.

Written by the indexing model from the issue text.