public StringBuilder insert(int offset, CharSequence s) {insert0(offset, s == null ? "null" : s.toString());return this;}

public StringBuilder insert ( int offset , CharSequence s ) { insert0 ( offset , s == null ? "null" : s . toString ( ) ) ; return this ; }
public java.lang.StringBuilder insert(int offset, char[] ch){insert0(offset, ch);return this;}
