resolveFile function
Resolve one file relative to another.
Implementation
File resolveFile(File thisDartFile, String relativeFile) {
final thisDartFileUri = Uri.file(thisDartFile.path);
final resolvedUri = thisDartFileUri.resolve(relativeFile);
final fileFromUri = File.fromUri(resolvedUri);
final fileFromUriForwardSlashes =
File(fileFromUri.path.replaceAll('\\', '/'));
return fileFromUriForwardSlashes;
}