Method clear

chapter20/src/main/java/com/seaofnodes/simple/SB.java:87–87

()

  public SB unchar(int x) { _sb.setLength(_sb.length()-x); return this; }

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