@JsonGetter("purchase_history")
    public List<PurchaseInfo> getPurchaseHistory ( ) { 
        return this.purchaseHistory;
    }
@JsonGetter("purchase_history")
    public List<PurchaseInfo> getPurchaseHistory ( ) { 
        return this.purchaseHistory;
    }
@jsongetter("purchase_history") public list<purchaseinfo> getpurchasehistory ( ) { return this.purchasehistory; }