Skip unknown properties in ownerSchema

Author: vearutop

src/JsonSchema/SchemaBuilder.php

@@ -311,8 +311,9 @@ private function copyTo(SchemaBuilder $schemaBuilder)
 
     private function processOther()
     {
-        static $skip = null;
+        static $skip = null, $emptySchema = null;
         if ($skip === null) {
+            $emptySchema = new Schema();
             $names = Schema::names();
             $skip = array(
                 $names->type => 1,
@@ -344,6 +345,10 @@ private function processOther()
                 continue;
             }
 
+            if (!property_exists($emptySchema, $key) && $key !== 'const' && $key[0] !== '$') {
+                continue;
+            }
+
             //$this->result->addSnippet('/* ' . print_r($value, 1) . '*/' . "\n");
             //echo "{$this->varName}->{$key}\n";
             if ($value instanceof ObjectItem) {