public StrBuilder insert(int index,Object obj){
  if (obj == null) {
    return insert(index,nullText);
  }
  return insert(index,obj.toString());
}

public StrBuilder insert ( int index , Object obj ) { if ( obj == null ) { return insert ( index , nullText ) ; } return insert ( index , obj . toString ( ) ) ; }
inserts the string representation of an object into this builder . inserting null will use the stored null text value .
