public int previousIndex() {int previous = iterator.previousIndex();if (previous >= start) {return previous - start;}return -1;}

public int previousIndex ( ) { int previous = iterator . previousIndex ( ) ; if ( previous >= start ) { return previous - start ; } return - 1 ; }
public int previousIndex(){int previous_1 = iterator.previousIndex();if (previous_1 >= start){return previous_1 - start;}return -1;}
