MAGETWO-83872: Write metadata service

Author: Eric Bohanon

app/code/Magento/Eav/Model/TypeLocator.php

@@ -28,6 +28,7 @@ class TypeLocator implements CustomAttributeTypeLocatorInterface
     /**
      * Initialize TypeLocator
      *
+     * @param ServiceTypeListInterface $serviceTypeList
      * @param \Magento\Framework\Webapi\CustomAttributeTypeLocatorInterface[] $typeLocators
      */
     public function __construct(

lib/internal/Magento/Framework/Webapi/ServiceTypeToEntityTypeMap.php

@@ -37,7 +37,7 @@ public function __construct($serviceTypeToEntityTypeMap)
     public function getEntityType(string $serviceType)
     {
         if (isset($this->serviceTypeToEntityTypeMap[$serviceType])) {
-            return $this->serviceTypeToEntityTypeMap;
+            return $this->serviceTypeToEntityTypeMap[$serviceType];
         }
 
         return false;