def checkbox_multiple_choice(name, choices = [], options = {})
      field name, MultipleChoiceField.new(choices, options.merge(widget: Widgets::CheckboxSelectMultiple.new))
    end
def checkbox_multiple_choice(name, choices = [], options = {})
      field name, MultipleChoiceField.new(choices, options.merge(widget: Widgets::CheckboxSelectMultiple.new))
    end
Declare a +MultipleChoiceField+ with the +CheckboxSelectMultiple+ widget