Add return types to internal|final|private methods

Author: nicolas-grekas

Command/LintCommand.php

@@ -199,10 +199,7 @@ private function getFiles(string $fileOrDirectory)
         }
     }
 
-    /**
-     * @return string|null
-     */
-    private function getStdin()
+    private function getStdin(): ?string
     {
         if (0 !== ftell(STDIN)) {
             return null;

Inline.php

@@ -34,12 +34,7 @@ class Inline
     private static $objectForMap = false;
     private static $constantSupport = false;
 
-    /**
-     * @param int         $flags
-     * @param int|null    $parsedLineNumber
-     * @param string|null $parsedFilename
-     */
-    public static function initialize($flags, $parsedLineNumber = null, $parsedFilename = null)
+    public static function initialize(int $flags, int $parsedLineNumber = null, string $parsedFilename = null)
     {
         self::$exceptionOnInvalidType = (bool) (Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE & $flags);
         self::$objectSupport = (bool) (Yaml::PARSE_OBJECT & $flags);