[Console] Add default parameter (true) for Command::setHidden()

Author: lyrixx

CHANGELOG.md

@@ -4,6 +4,7 @@ CHANGELOG
 5.1.0
 -----
 
+ * `Command::setHidden()` is final since Symfony 5.1
  * Add `SingleCommandApplication`
 
 5.0.0

Command/Command.php

@@ -450,10 +450,13 @@ public function getName()
 
     /**
      * @param bool $hidden Whether or not the command should be hidden from the list of commands
+     *                     The default value will be true in Symfony 6.0
      *
      * @return Command The current instance
+     *
+     * @final since Symfony 5.1
      */
-    public function setHidden(bool $hidden)
+    public function setHidden(bool $hidden /*= true*/)
     {
         $this->hidden = $hidden;