From e7ba0b0f587bc9ecb7a221f66c96d54edcbec06d Mon Sep 17 00:00:00 2001
From: John5 <john.is.offline+github@gmail.com>
Date: Fri, 14 Jun 2019 10:31:59 +0200
Subject: [PATCH 1/4] Made arguments optional

Some requests do not allow sortFields so they need to made optional.
---
 src/BrowseDataRow.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/BrowseDataRow.php b/src/BrowseDataRow.php
index 4ae7f1b8..2a13b068 100644
--- a/src/BrowseDataRow.php
+++ b/src/BrowseDataRow.php
@@ -57,7 +57,7 @@ public function getCode(): string
      * @param string $code
      * @return BrowseDataRow
      */
-    public function setCode(string $code): BrowseDataRow
+    public function setCode(?string $code): BrowseDataRow
     {
         $this->code = $code;
         return $this;
@@ -75,7 +75,7 @@ public function getNumber(): int
      * @param int $number
      * @return BrowseDataRow
      */
-    public function setNumber(int $number): BrowseDataRow
+    public function setNumber(?int $number): BrowseDataRow
     {
         $this->number = $number;
         return $this;
@@ -93,7 +93,7 @@ public function getLine(): int
      * @param int $line
      * @return BrowseDataRow
      */
-    public function setLine(int $line): BrowseDataRow
+    public function setLine(?int $line): BrowseDataRow
     {
         $this->line = $line;
         return $this;

From b6be9d89d386a61cd2a7a4d8895ffcd61f86ef18 Mon Sep 17 00:00:00 2001
From: John5 <john.is.offline+github@gmail.com>
Date: Fri, 14 Jun 2019 10:42:55 +0200
Subject: [PATCH 2/4] Made sortFields optional

---
 src/Request/BrowseData.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/Request/BrowseData.php b/src/Request/BrowseData.php
index 76aed249..cfefa7ca 100644
--- a/src/Request/BrowseData.php
+++ b/src/Request/BrowseData.php
@@ -39,7 +39,9 @@ public function __construct(string $code, array $columns, array $sortFields = []
         parent::__construct();
 
         Assert::allIsInstanceOf($columns, BrowseColumn::class);
-        Assert::allIsInstanceOf($sortFields, BrowseSortField::class);
+        if(count($sortFields)) {
+            Assert::allIsInstanceOf($sortFields, BrowseSortField::class);
+        }
 
         $this->columnsElement = $this->createElement('columns');
         $this->columnsElement->setAttribute('code', $code);
@@ -48,7 +50,9 @@ public function __construct(string $code, array $columns, array $sortFields = []
         $this->columnsElement->appendChild($this->sortElement);
 
         $this->addColumns($columns);
-        $this->addSortFields($sortFields);
+        if(count($sortFields)) {
+            $this->addSortFields($sortFields);
+        }
 
         $this->appendChild($this->columnsElement);
     }

From cc9ab203e8e7073f454dfe1702cd652e4cbe073a Mon Sep 17 00:00:00 2001
From: John5 <john.is.offline+github@gmail.com>
Date: Fri, 14 Jun 2019 10:56:44 +0200
Subject: [PATCH 3/4] Made sortFields optional

---
 src/ApiConnectors/BrowseDataApiConnector.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/ApiConnectors/BrowseDataApiConnector.php b/src/ApiConnectors/BrowseDataApiConnector.php
index 2fa2d9b0..abfac08d 100644
--- a/src/ApiConnectors/BrowseDataApiConnector.php
+++ b/src/ApiConnectors/BrowseDataApiConnector.php
@@ -69,8 +69,10 @@ public function getBrowseData(string $code, array $columns, array $sortFields =
     {
         Assert::minCount($columns, 1);
         Assert::allIsInstanceOf($columns, BrowseColumn::class);
-        Assert::allIsInstanceOf($sortFields, BrowseSortField::class);
-
+        if(count($sortFields)) {
+            Assert::allIsInstanceOf($sortFields, BrowseSortField::class);
+        }
+        
         $requestBrowseData = new BrowseData($code, $columns, $sortFields);
 
         $response = $this->sendXmlDocument($requestBrowseData);

From c6886701e2d560535b868ca18aa4996cafde61d7 Mon Sep 17 00:00:00 2001
From: John5 <john.is.offline+github@gmail.com>
Date: Fri, 14 Jun 2019 14:24:42 +0200
Subject: [PATCH 4/4] Updated comments

---
 src/BrowseDataRow.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/BrowseDataRow.php b/src/BrowseDataRow.php
index 2a13b068..b49ae1a8 100644
--- a/src/BrowseDataRow.php
+++ b/src/BrowseDataRow.php
@@ -54,7 +54,7 @@ public function getCode(): string
     }
 
     /**
-     * @param string $code
+     * @param string|null $code
      * @return BrowseDataRow
      */
     public function setCode(?string $code): BrowseDataRow
@@ -72,7 +72,7 @@ public function getNumber(): int
     }
 
     /**
-     * @param int $number
+     * @param int|null $number
      * @return BrowseDataRow
      */
     public function setNumber(?int $number): BrowseDataRow
@@ -90,7 +90,7 @@ public function getLine(): int
     }
 
     /**
-     * @param int $line
+     * @param int|null $line
      * @return BrowseDataRow
      */
     public function setLine(?int $line): BrowseDataRow