class RuboCop::Cop::RSpec::VariableDefinition

def on_send(node)
  return unless inside_example_group?(node)
  variable_definition?(node) do |variable|
    next unless style_offense?(variable)
    add_offense(
      variable,
      message: format(MSG, style: style)
    ) do |corrector|
      corrector.replace(variable, correct_variable(variable))
    end
  end
end