Add missing PHPdoc return types

Author: wouterj

Exception/ProcessTimedOutException.php

@@ -43,11 +43,17 @@ public function getProcess()
         return $this->process;
     }
 
+    /**
+     * @return bool
+     */
     public function isGeneralTimeout()
     {
         return self::TYPE_GENERAL === $this->timeoutType;
     }
 
+    /**
+     * @return bool
+     */
     public function isIdleTimeout()
     {
         return self::TYPE_IDLE === $this->timeoutType;

InputStream.php

@@ -62,6 +62,8 @@ public function close()
 
     /**
      * Tells whether the write buffer is closed or not.
+     *
+     * @return bool
      */
     public function isClosed()
     {