class RuboCop::Cop::Style::SingleLineMethods

def on_method(node, _method_name, _args, body)
  start_line = node.loc.keyword.line
  end_line = node.loc.end.line
  empty_body = body.nil?
  return unless start_line == end_line && !(allow_empty? && empty_body)
  @body = body
  add_offense(node, :expression)
end