class RuboCop::Cop::Layout::SpaceBeforeBlockBraces

def space_detected(left_brace, space_plus_brace)
  space = range_between(space_plus_brace.begin_pos,
                        left_brace.begin_pos)
  add_offense(space, location: space, message: DETECTED_MSG) do
    opposite_style_detected
  end
end