diff --git a/sample/doc/assets/behavior.js b/sample/doc/assets/behavior.js
index 117f5f4..9fd4c5a 100644
--- a/sample/doc/assets/behavior.js
+++ b/sample/doc/assets/behavior.js
@@ -310,7 +310,77 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "invoice/CreateInvoice",
             "title": "CreateInvoice"
           },
-          "depth": 2
+          "depth": 2,
+          "outline": [
+            {
+              "type": "heading",
+              "data": {
+                "level": 1,
+                "title": "Create Invoice Sample",
+                "slug": "create-invoice-sample"
+              },
+              "depth": 1,
+              "children": [
+                {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Invoice Info",
+                    "slug": "invoice-info"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Merchant Info",
+                    "slug": "merchant-info"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Address Information",
+                    "slug": "address-information"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Billing Information",
+                    "slug": "billing-information"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Items List",
+                    "slug": "items-list"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Shipping Information",
+                    "slug": "shipping-information"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Create Invoice",
+                    "slug": "create-invoice"
+                  },
+                  "depth": 3
+                }
+              ]
+            }
+          ]
         }, {
           "type": "file",
           "data": {
@@ -1260,40 +1330,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payouts/GetPayoutItemStatus",
             "title": "GetPayoutItemStatus"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Get Payout Item Status Sample",
-                "slug": "get-payout-item-status-sample"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 2,
-                    "title": "Payout Item ID",
-                    "slug": "payout-item-id"
-                  },
-                  "depth": 2,
-                  "children": [
-                    {
-                      "type": "heading",
-                      "data": {
-                        "level": 3,
-                        "title": "Get Payout Item Status",
-                        "slug": "get-payout-item-status"
-                      },
-                      "depth": 3
-                    }
-                  ]
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }
       ]
     }, {
diff --git a/sample/doc/invoice/CreateInvoice.html b/sample/doc/invoice/CreateInvoice.html
index b7303e6..a75c1ea 100644
--- a/sample/doc/invoice/CreateInvoice.html
+++ b/sample/doc/invoice/CreateInvoice.html
@@ -16,7 +16,6 @@ an invoice.</p></div></div><div class="code"><div class="wrapper"><span class="h
 required for invoice APIs</p></div></div><div class="code"><div class="wrapper"><span class="hljs-variable">$invoice</span>
     -&gt;setMerchantInfo(<span class="hljs-keyword">new</span> MerchantInfo())
     -&gt;setBillingInfo(<span class="hljs-keyword">array</span>(<span class="hljs-keyword">new</span> BillingInfo()))
-    -&gt;setItems(<span class="hljs-keyword">array</span>(<span class="hljs-keyword">new</span> InvoiceItem()))
     -&gt;setNote(<span class="hljs-string">"Medical Invoice 16 Jul, 2013 PST"</span>)
     -&gt;setPaymentTerm(<span class="hljs-keyword">new</span> PaymentTerm())
     -&gt;setShippingInfo(<span class="hljs-keyword">new</span> ShippingInfo());</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="merchant-info">Merchant Info</h3>
@@ -42,15 +41,25 @@ used to identify merchant</p></div></div><div class="code"><div class="wrapper">
 <span class="hljs-variable">$billing</span>[<span class="hljs-number">0</span>]
     -&gt;setEmail(<span class="hljs-string">"example@example.com"</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="items-list">Items List</h3>
 <p>You could provide the list of all items for
-detailed breakdown of invoice</p></div></div><div class="code"><div class="wrapper"><span class="hljs-variable">$items</span> = <span class="hljs-variable">$invoice</span>-&gt;getItems();
+detailed breakdown of invoice</p></div></div><div class="code"><div class="wrapper"><span class="hljs-variable">$items</span> = <span class="hljs-keyword">array</span>();
+<span class="hljs-variable">$items</span>[<span class="hljs-number">0</span>] = <span class="hljs-keyword">new</span> InvoiceItem();
 <span class="hljs-variable">$items</span>[<span class="hljs-number">0</span>]
     -&gt;setName(<span class="hljs-string">"Sutures"</span>)
     -&gt;setQuantity(<span class="hljs-number">100</span>)
     -&gt;setUnitPrice(<span class="hljs-keyword">new</span> Currency());
 
 <span class="hljs-variable">$items</span>[<span class="hljs-number">0</span>]-&gt;getUnitPrice()
+    -&gt;setCurrency(<span class="hljs-string">"USD"</span>)
+    -&gt;setValue(<span class="hljs-number">5</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><p>Second Item</p></div></div><div class="code"><div class="wrapper"><span class="hljs-variable">$items</span>[<span class="hljs-number">1</span>] = <span class="hljs-keyword">new</span> InvoiceItem();
+<span class="hljs-variable">$items</span>[<span class="hljs-number">1</span>]
+    -&gt;setName(<span class="hljs-string">"Injection"</span>)
+    -&gt;setQuantity(<span class="hljs-number">5</span>)
+    -&gt;setUnitPrice(<span class="hljs-keyword">new</span> Currency());
+
+<span class="hljs-variable">$items</span>[<span class="hljs-number">1</span>]-&gt;getUnitPrice()
     -&gt;setCurrency(<span class="hljs-string">"USD"</span>)
     -&gt;setValue(<span class="hljs-number">5</span>);
+<span class="hljs-variable">$invoice</span>-&gt;setItems(<span class="hljs-variable">$items</span>);
 
 <span class="hljs-variable">$invoice</span>-&gt;getPaymentTerm()
     -&gt;setTermType(<span class="hljs-string">"NET_45"</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="shipping-information">Shipping Information</h3></div></div></div><div class="segment"><div class="code"><div class="wrapper"><span class="hljs-variable">$invoice</span>-&gt;getShippingInfo()