private static String findFirstMatchingLine(String data,String prefix){
  if (data == null) {
    return "";
  }
  int ix=data.indexOf(prefix);
  if (ix >= 0) {
    int iy=data.indexOf("\n",ix);
    if (iy > 0) {
      return data.substring(ix,iy);
    }
  }
  return "";
}

private static String findFirstMatchingLine ( String data , String prefix ) { if ( data == null ) { return "" ; } int ix = data . indexOf ( prefix ) ; if ( ix >= 0 ) { int iy = data . indexOf ( "\n" , ix ) ; if ( iy > 0 ) { return data . substring ( ix , iy ) ; } } return "" ; }
filter the mappings and only return lines matching the prefix passed in .
