chore: cleanup, use static

Author: JoeyMckenzie

src/Illuminate/Support/Str.php

@@ -9,6 +9,7 @@
 use League\CommonMark\Extension\InlinesOnly\InlinesOnlyExtension;
 use League\CommonMark\GithubFlavoredMarkdownConverter;
 use League\CommonMark\MarkdownConverter;
+use mysql_xdevapi\Statement;
 use Ramsey\Uuid\Codec\TimestampFirstCombCodec;
 use Ramsey\Uuid\Exception\InvalidUuidStringException;
 use Ramsey\Uuid\Generator\CombGenerator;
@@ -2120,7 +2121,7 @@ public static function nullOrEmpty($string)
      */
     public static function nullOrWhitespace($string)
     {
-        return self::nullOrEmpty($string) || trim($string) === '';
+        return static::nullOrEmpty($string) || trim($string) === '';
     }
 
     /**
@@ -2131,7 +2132,7 @@ public static function nullOrWhitespace($string)
      */
     public static function notNullOrEmpty($string)
     {
-        return ! self::nullOrEmpty($string);
+        return ! static::nullOrEmpty($string);
     }
 
     /**
@@ -2142,6 +2143,6 @@ public static function notNullOrEmpty($string)
      */
     public static function notNullOrWhitespace($string)
     {
-        return ! self::nullOrWhitespace($string);
+        return ! static::nullOrWhitespace($string);
     }
 }