plataformatec/simple_form — comment on commit b318d34282da414958566f411831b0e4d3b90cb4
File: lib/simple_form/inputs/collection_radio_buttons_input.rb line 28
By rafaelfranca:

Yeah it is needed. If you want to set the `:collection_wrapper_tag` to `nil` or `false` without this fetch you will never get this behavior, and it will be equals to `SimpleForm.collection_wrapper_tag`