public RetrieveCommand( String command, FTPFile fromFile, FTPFile toFile )
public RetrieveCommand( String command, FTPFile fromFile )
    public RetrieveCommand( String command, FTPFile fromFile, FTPFile toFile )    {       super(command, new String[]{fromFile.getName()} );       setFromFile( fromFile );       setToFile ( toFile );    }