public void sheetManageLifecycleOnStart(@Nullable final UnifiedMapViewModel.SheetInfo sheetInfo, @NonNull final Action1<UnifiedMapViewModel.SheetInfo> setSheetInfo) {
        sheetRemoveFragment();
        setSheetInfo.call(sheetInfo);
        sheetShowDetails(sheetInfo);
    }
removes fragment and view for mapdetails view; returns true, if view got removed
main/src/main/java/cgeo/geocaching/activity/AbstractNavigationBarMapActivity.java