class RuboCop::Cop::Lint::FormatParameterMismatch

def named_mode?(node)
  receiver_node, _method_name, *args = *node
  relevant_node = if sprintf?(node) || format?(node)
                    args.first
                  elsif percent?(node)
                    receiver_node
                  end
  !relevant_node.source.scan(NAMED_FIELD_REGEX).empty?
end