getAndCheckIfLibsDirectoryExists method
Ensures the specified libsFolderName directory exists and returns it.
Throws a LibraryFolderNotFoundException if the directory does not exist.
Returns the Directory representing the lib/ folder.
Implementation
Directory getAndCheckIfLibsDirectoryExists(String libsFolderName) {
final projectDirectory = Directory(libsFolderName);
if (!projectDirectory.existsSync()) {
throw LibraryFolderNotFoundException();
}
return projectDirectory;
}