@Override
            public boolean onLongClick(View view) {
                return showCheatSheet(view, view.getContentDescription());
            }
Sets up a cheat sheet (tooltip) for the given view by setting its {@link
android.view.View.OnLongClickListener}. When the view is long-pressed, a {@link Toast} with
the view's {@link android.view.View#getContentDescription() content description} will be
shown either above (default) or below the view (if there isn't room above it).

@param view The view to add a cheat sheet for.
library/src/main/java/com/heinrichreimersoftware/materialintro/util/CheatSheet.java