updating stubs to have fluent setters and retaining deprecated methods

lib/PayPal/Api/Amount.php

@@ -9,8 +9,9 @@ class Amount extends \PPModel {
 	 */
 	public function setCurrency($currency) {
 		$this->currency = $currency;
-	}	
-	
+		return $this;
+	}
+
 	/**
 	 * 3 letter currency code
 	 * @return string
@@ -18,15 +19,17 @@ class Amount extends \PPModel {
 	public function getCurrency() {
 		return $this->currency;
 	}
-	
+
+
 	/**
 	 * Total amount charged from the Payer account (or card) to Payee. In case of a refund, this is the refunded amount to the original Payer from Payee account.
 	 * @param string $total
 	 */
 	public function setTotal($total) {
 		$this->total = $total;
-	}	
-	
+		return $this;
+	}
+
 	/**
 	 * Total amount charged from the Payer account (or card) to Payee. In case of a refund, this is the refunded amount to the original Payer from Payee account.
 	 * @return string
@@ -34,15 +37,17 @@ class Amount extends \PPModel {
 	public function getTotal() {
 		return $this->total;
 	}
-	
+
+
 	/**
 	 * Additional details of the payment amount.
 	 * @param PayPal\Api\Details $details
 	 */
 	public function setDetails($details) {
 		$this->details = $details;
-	}	
-	
+		return $this;
+	}
+
 	/**
 	 * Additional details of the payment amount.
 	 * @return PayPal\Api\Details
@@ -50,5 +55,6 @@ class Amount extends \PPModel {
 	public function getDetails() {
 		return $this->details;
 	}
-	
+
+
 }