code: public static StringBuilder appendTimes(StringBuilder sb, String append, int times) {
  		
  		for(;times>0; times--)
  			sb.append(append);
  		
  		return sb;
  	}
docs: Appends string multiple times to buffer
  @param sb StringBuilder to be modified
  @param append String to be added
  @param times Number of times <code>append</code> is added
  @return Modified StringBuilder <code>sb</code> to allow chaining