Enabled EC Parameters support

- Updated Api to enabled EC Parameters
- Updated Tests
- Updated Logging Manager
- Added a feature to do validation on accessors.

lib/PayPal/Api/PaymentOptions.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace PayPal\Api;
+
+use PayPal\Common\PPModel;
+use PayPal\Rest\ApiContext;
+
+/**
+ * Class PaymentOptions
+ *
+ * Payment options requested for this purchase unit
+ *
+ * @package PayPal\Api
+ *
+ * @property string allowed_payment_method
+ */
+class PaymentOptions extends PPModel
+{
+    /**
+     * Payment method requested for this purchase unit
+     * Valid Values: ["UNRESTRICTED", "INSTANT_FUNDING_SOURCE", "IMMEDIATE_PAY"] 
+     *
+     * @param string $allowed_payment_method
+     * 
+     * @return $this
+     */
+    public function setAllowedPaymentMethod($allowed_payment_method)
+    {
+        $this->allowed_payment_method = $allowed_payment_method;
+        return $this;
+    }
+
+    /**
+     * Payment method requested for this purchase unit
+     *
+     * @return string
+     */
+    public function getAllowedPaymentMethod()
+    {
+        return $this->allowed_payment_method;
+    }
+
+    /**
+     * Payment method requested for this purchase unit
+     *
+     * @deprecated Instead use setAllowedPaymentMethod
+     *
+     * @param string $allowed_payment_method
+     * @return $this
+     */
+    public function setAllowed_payment_method($allowed_payment_method)
+    {
+        $this->allowed_payment_method = $allowed_payment_method;
+        return $this;
+    }
+
+    /**
+     * Payment method requested for this purchase unit
+     * @deprecated Instead use getAllowedPaymentMethod
+     *
+     * @return string
+     */
+    public function getAllowed_payment_method()
+    {
+        return $this->allowed_payment_method;
+    }
+
+}