public String prefixForward(int length){
  final String prefix=prefix(length);
  this.pointer+=length;
  this.index+=length;
  this.column+=length;
  return prefix;
}

public String prefixForward ( int length ) { final String prefix = prefix ( length ) ; this . pointer += length ; this . index += length ; this . column += length ; return prefix ; }
prefix ( length ) immediately followed by forward ( length )
