class RuboCop::Cop::Style::OptionHash

end
…
def fry(temperature: 300)
Prefer:
end
…
temperature = options.fetch(:temperature, 300)
def fry(options = {})
Instead of:
@example
current Ruby version supports keyword arguments.
This cop checks for options hashes and discourages them if the

def name_in_suspicious_param_names?(arg_name) 

def name_in_suspicious_param_names?(arg_name)
  cop_config.key?('SuspiciousParamNames') &&
    cop_config['SuspiciousParamNames'].include?(arg_name.to_s)
end

def on_args(node) 

def on_args(node)
  *_but_last, last_arg = *node
  # asserting that there was an argument at all
  return unless last_arg
  # asserting last argument is an optional argument
  return unless last_arg.optarg_type?
  arg, default_value = *last_arg
  # asserting default value is a hash
  return unless default_value.hash_type?
  # asserting default value is empty hash
  *key_value_pairs = *default_value
  return unless key_value_pairs.empty?
  # Check for suspicious argument names
  return unless name_in_suspicious_param_names?(arg)
  add_offense(last_arg, :expression, MSG)
end

def validate_config 

def validate_config
  if target_ruby_version < 2.0
    raise ValidationError, 'The `Style/OptionHash` cop is only ' \
                          'compatible with Ruby 2.0 and up, but the ' \
                          'target Ruby version for your project is ' \
                          "1.9.\nPlease disable this cop or adjust " \
                          'the `TargetRubyVersion` parameter in your ' \
                          'configuration.'
  end
end