class SimpleCov::Formatter::LcovFormatter

def report_with_single_file=(value)
  deprecation_message = \
    "#{caller(1..1).first} " \
    "`#{LcovFormatter}.report_with_single_file=` is deprecated. " \
    "Use `#{LcovFormatter}.config.report_with_single_file=` instead"
  warn deprecation_message
  config.report_with_single_file = value
end