Method realThis

rhino/src/main/java/org/mozilla/javascript/NativeSet.java:237–244

(Object thisObj, String name)

    }

    private static NativeSet realThis(Object thisObj, String name) {
        NativeSet ns = LambdaConstructor.convertThisObject(thisObj, NativeSet.class);
        if (!ns.instanceOfSet) {
            // If we get here, then this object doesn't have the "Set internal data slot."
            throw ScriptRuntime.typeErrorById("msg.incompat.call", name);
        }
        return ns;
    }

    // ES2025 Set Methods Implementation