Fix Psalm errors in Psalm

src/Psalm/Checker/ClassChecker.php

@@ -31,6 +31,9 @@ class ClassChecker extends ClassLikeChecker
      */
     protected static $class_extends = [];
 
+    /**
+     * @var integer
+     */
     protected static $anonymous_class_count = 0;
 
     /**

src/Psalm/Checker/ClassLikeChecker.php

@@ -22,6 +22,9 @@ use ReflectionProperty;
 
 abstract class ClassLikeChecker implements StatementsSource
 {
+    /**
+     * @var array
+     */
     protected static $SPECIAL_TYPES = ['int', 'string', 'float', 'bool', 'false', 'object', 'empty', 'callable', 'array'];
 
     /**
@@ -992,7 +995,7 @@ abstract class ClassLikeChecker implements StatementsSource
     /**
      * @param  string $class_name
      * @param  mixed  $visibility
-     * @return array<string,Type\Union>
+     * @return array<string,Type\Union|false>
      */
     public static function getStaticPropertiesForClass($class_name, $visibility)
     {

src/Psalm/Checker/FileChecker.php

@@ -27,26 +27,25 @@ class FileChecker implements StatementsSource
      */
     protected $include_file_name;
 
-    /**
-     * @var string
-     */
-    protected $namespace;
-
     /**
      * @var array
      */
     protected $aliased_classes = [];
 
-    protected $class_name;
-
+    /**
+     * @var array<string, array<int, string>>
+     */
     protected $namespace_aliased_classes = [];
 
+    /**
+     * @var array<int, \PhpParser\Node>
+     */
     protected $preloaded_statements = [];
 
     protected $declared_classes = [];
 
     /**
-     * @var array
+     * @var array<int, string>
      */
     protected $suppressed_issues = [];
 
@@ -423,7 +422,7 @@ class FileChecker implements StatementsSource
 
     public function getClassName()
     {
-        return $this->class_name;
+        return null;
     }
 
     /**