Look for the source file if it's different from filename. Look for .di, .d, directory, and along global.path. Does not open the file.
as supplied by the user
path to look for filename
the found file name or null if it is not different from filename.
See Implementation
Look for the source file if it's different from filename. Look for .di, .d, directory, and along global.path. Does not open the file.