package com.reactnativenavigation.react;

public class Constants {
    public static final String BACK_BUTTON_JS_KEY = "backButton";
    public static final String BACK_BUTTON_ID = "RNN.back";
    public static final String STATUS_BAR_HEIGHT_KEY = "statusBarHeight";
}

@@ -123,16 +123,18 @@
 ckButton
+Id
 %22;%0A    p

Rename backButton id constant to backButtonId