magento/graphql-ce#970 Cannot return several errors for one GraphQL request

Author: lenaorobei

lib/internal/Magento/Framework/GraphQl/Exception/GraphQlInputException.php

@@ -62,6 +62,8 @@ public function getCategory() : string
     }
 
     /**
+     * Add child error if used as aggregate exception
+     *
      * @param LocalizedException $exception
      * @return $this
      */
@@ -72,6 +74,8 @@ public function addError(LocalizedException $exception): self
     }
 
     /**
+     * Get child errors if used as aggregate exception
+     *
      * @return LocalizedException[]
      */
     public function getErrors(): array