module Rack::Request::Helpers

def []=(key, value)

Note that modifications will not be persisted in the env. Use update_param or delete_param if you want to destructively modify params.

shortcut for request.params[key] = value 
def []=(key, value)
  warn("Request#[]= is deprecated and will be removed in a future version of Rack. Please use request.params[]= instead", uplevel: 1)
  params[key.to_s] = value
end