fixed psalm issues

psalm.xml

@@ -1,25 +1,38 @@
 <?xml version="1.0"?>
 <psalm
-    resolveFromConfigFile="true"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xmlns="https://getpsalm.org/schema/config"
-    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+  errorLevel="4"
+  usePhpDocMethodsWithoutMagicCall="true"
+  findUnusedPsalmSuppress="true"
+  findUnusedBaselineEntry="true"
+  findUnusedCode="false"
+  resolveFromConfigFile="true"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xmlns="https://getpsalm.org/schema/config"
+  xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+  autoloader="tests/bootstrap.php"
 >
-    <projectFiles>
-        <directory name="src" />
-        <ignoreFiles>
-            <directory name="vendor" />
-        </ignoreFiles>
-    </projectFiles>
+  <projectFiles>
+    <directory name="src/"/>
+    <ignoreFiles>
+      <directory name="vendor/"/>
+    </ignoreFiles>
+  </projectFiles>
 
-    <issueHandlers>
-        <MissingClosureReturnType errorLevel="info" />
+  <issueHandlers>
+    <LessSpecificReturnType errorLevel="suppress" />
+    <RedundantPropertyInitializationCheck errorLevel="suppress"/>
+    <RedundantCast errorLevel="suppress"/>
+    <UndefinedAttributeClass errorLevel="suppress"/>
+    <LessSpecificReturnType errorLevel="info" />
 
-        <PropertyNotSetInConstructor errorLevel="info" />
-        <MissingConstructor errorLevel="info" />
-        <MissingClosureParamType errorLevel="info" />
+    <MissingClosureReturnType errorLevel="info" />
 
-        <DocblockTypeContradiction errorLevel="info" />
-        <RedundantConditionGivenDocblockType errorLevel="info" />
-    </issueHandlers>
+    <PropertyNotSetInConstructor errorLevel="info" />
+    <MissingConstructor errorLevel="info" />
+    <MissingClosureParamType errorLevel="info" />
+    <MissingParamType errorLevel="info" />
+
+    <DocblockTypeContradiction errorLevel="info" />
+    <RedundantConditionGivenDocblockType errorLevel="info" />
+  </issueHandlers>
 </psalm>

src/View/Helper/DatatableHelper.php

@@ -60,7 +60,7 @@ class DatatableHelper extends Helper
     ];
 
     // @todo maybe array of instances
-    private Datatable $dtInstance;
+    private ?Datatable $dtInstance = null;
 
     /**
      * @param array $config