public Observable<DriveId> createFile(DriveFolder folder,final InputStream inputStream){
  return createFile(folder,inputStream,String.valueOf(System.currentTimeMillis()));
}

public Observable < DriveId > createFile ( DriveFolder folder , final InputStream inputStream ) { return createFile ( folder , inputStream , String . valueOf ( System . currentTimeMillis ( ) ) ) ; }
creates a file on drive
