Add remaining missing return types to safe methods

Author: wouterj

Descriptor/Descriptor.php

@@ -50,25 +50,25 @@ protected function write(string $content, bool $decorated = false): void
     /**
      * Describes an InputArgument instance.
      */
-    abstract protected function describeInputArgument(InputArgument $argument, array $options = []);
+    abstract protected function describeInputArgument(InputArgument $argument, array $options = []): void;
 
     /**
      * Describes an InputOption instance.
      */
-    abstract protected function describeInputOption(InputOption $option, array $options = []);
+    abstract protected function describeInputOption(InputOption $option, array $options = []): void;
 
     /**
      * Describes an InputDefinition instance.
      */
-    abstract protected function describeInputDefinition(InputDefinition $definition, array $options = []);
+    abstract protected function describeInputDefinition(InputDefinition $definition, array $options = []): void;
 
     /**
      * Describes a Command instance.
      */
-    abstract protected function describeCommand(Command $command, array $options = []);
+    abstract protected function describeCommand(Command $command, array $options = []): void;
 
     /**
      * Describes an Application instance.
      */
-    abstract protected function describeApplication(Application $application, array $options = []);
+    abstract protected function describeApplication(Application $application, array $options = []): void;
 }

Helper/ProgressBar.php

@@ -183,7 +183,7 @@ public function setMessage(string $message, string $name = 'message'): void
         $this->messages[$name] = $message;
     }
 
-    public function getMessage(string $name = 'message')
+    public function getMessage(string $name = 'message'): string
     {
         return $this->messages[$name];
     }