class Faraday::Env

def clear_body
  request_headers[ContentLength] = '0'
  self.body = ''
end

def needs_body?
  !body && MethodsWithBodies.include?(method)
end

def parallel?
  !!parallel_manager
end

def parse_body?
  !StatusesWithoutBody.include?(status)
end

def success?
  SuccessfulStatuses.include?(status)
end