forEach is unresolved reference

[khkhy]

Dear sir
This app is very useful for my mapbox project . I have built my project in java. I am not able to convert this to java by myself. How can I convert this to a working version of java. I have tried to do Kotlin decompile function in Android Studio. Not working. Is there any way that you could help me?

Nevertheless, even if I am trying to run and execute it in Kotlin, in the line 162 symbols.forEach{k,v->v.iconImage = ID_ICON_LOCATION} - the forEach iterator can not be recognized/resolved. Even though the lines from 35-41 is included in the activity.