Merge pull request #184 from lohanidamodar/fix-flutter-image-preview

required keyword and type_number

Author: eldadfux

src/SDK/Language/Dart.php

@@ -100,6 +100,7 @@ public function getKeywords()
             "if",
             "set",
             "yield",
+            "required"
         ];
     }
 
@@ -124,8 +125,10 @@ public function getTypeName($type)
             break;
             case self::TYPE_ARRAY:
             	return 'List';
-			case self::TYPE_OBJECT:
-				return 'Map';
+	        case self::TYPE_OBJECT:
+		        return 'Map';
+            case self::TYPE_NUMBER:
+                return 'double';
             break;
         }