Updated Invoicing APIs

- Updated Model objects.
- Updated Samples.
- Updated Tests.

lib/PayPal/Api/TemplateSettings.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace PayPal\Api;
+
+use PayPal\Common\PayPalModel;
+
+/**
+ * Class TemplateSettings
+ *
+ * Settings per template
+ *
+ * @package PayPal\Api
+ *
+ * @property string field_name
+ * @property \PayPal\Api\TemplateSettingsMetadata display_preference
+ */
+class TemplateSettings extends PayPalModel
+{
+    /**
+     * The field name (for any field in template_data) for which the corresponding display preferences will be mapped to.
+     *
+     * @param string $field_name
+     * 
+     * @return $this
+     */
+    public function setFieldName($field_name)
+    {
+        $this->field_name = $field_name;
+        return $this;
+    }
+
+    /**
+     * The field name (for any field in template_data) for which the corresponding display preferences will be mapped to.
+     *
+     * @return string
+     */
+    public function getFieldName()
+    {
+        return $this->field_name;
+    }
+
+    /**
+     * Settings metadata for each field.
+     *
+     * @param \PayPal\Api\TemplateSettingsMetadata $display_preference
+     * 
+     * @return $this
+     */
+    public function setDisplayPreference($display_preference)
+    {
+        $this->display_preference = $display_preference;
+        return $this;
+    }
+
+    /**
+     * Settings metadata for each field.
+     *
+     * @return \PayPal\Api\TemplateSettingsMetadata
+     */
+    public function getDisplayPreference()
+    {
+        return $this->display_preference;
+    }
+
+}