class PurityStmtNode implements PurityNode {

  /** gives a unique id, for pretty-printing purposes */
  private static final Map<Stmt, Integer> nMap = new HashMap<Stmt, Integer>();
  private static int n = 0;

  /** Statement that created the node */
  private final Stmt id;

  /** true if an inside node, false if an load node */
  private final boolean inside;

  PurityStmtNode(Stmt id, boolean inside) {
    this.id = id;
    this.inside = inside;
    if (!nMap.containsKey(id)) {
      nMap.put(id, n);
      n++;
    }
  }

  @Override
  public String toString() {
    return inside ? ("I_" + nMap.get(id)) : ("L_" + nMap.get(id));
  }

  @Override
  public int hashCode() {
    return id.hashCode();
  }

  @Override
  public boolean equals(Object o) {<FILL_FUNCTION_BODY>}

  @Override
  public boolean isInside() {
    return inside;
  }

  @Override
  public boolean isLoad() {
    return !inside;
  }

  @Override
  public boolean isParam() {
    return false;
  }
}

    if (o instanceof PurityStmtNode) {
      PurityStmtNode oo = (PurityStmtNode) o;
      return this.id.equals(oo.id) && this.inside == oo.inside;
    } else {
      return false;
    }
  
<no_super_class>