throw new Error("not implemented");
SetOfIntegerSyntax other = (SetOfIntegerSyntax) obj; if (other.members.length != members.length) return false; for (int i = 0; i < members.length; ++i) { if (members[i][0] != other.members[i][0] || members[i][1] != other.members[i][1]) return false; } return true;
  public boolean equals(Object obj)  {    if (! (obj instanceof SetOfIntegerSyntax))      return false;    throw new Error("not implemented");  }