LibJS: Convert has_own_property() to ThrowCompletionOr

Author: https://github.com/linusg
Commit: 3be26f56db
Pull-request: https://github.com/SerenityOS/serenity/pull/10327
Reviewed-by: https://github.com/IdanHo ✅

Userland/Applications/Spreadsheet/Spreadsheet.cpp

@@ -656,7 +656,7 @@ JsonObject Sheet::gather_documentation() const
             return;
 
         auto& value_object = value.is_object() ? value.as_object() : value.as_function();
-        if (!value_object.has_own_property(doc_name))
+        if (!value_object.has_own_property(doc_name).release_value())
             return;
 
         dbgln("Found '{}'", it.key.to_display_string());