@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		WhileStatementNode other = (WhileStatementNode) obj;
		if (exp1 == null) {
			if (other.exp1 != null)
				return false;
		} else if (!exp1.equals(other.exp1))
			return false;
		if (stateSeq1 == null) {
			if (other.stateSeq1 != null)
				return false;
		} else if (!stateSeq1.equals(other.stateSeq1))
			return false;
		return true;
	}