Method clear

chapter21/src/main/java/com/seaofnodes/simple/SB.java:96–96

()

  public String subString(int start, int end ) { return _sb.substring(start,end); }

  public SB clear() { _sb.setLength(0); return this; }
  public int len() { return _sb.length(); }
  @Override public String toString() { return _sb.toString(); }
}