ruby2_keywords is not an instance method

[znz]

elasticsearch-rails/elasticsearch-model/lib/elasticsearch/model/proxy.rb

Line 118 in 8fe0a55

def ruby2_keywords(*) # :nodoc:

defines an instance method.
But

elasticsearch-rails/elasticsearch-model/lib/elasticsearch/model/proxy.rb

Line 123 in 8fe0a55

ruby2_keywords def method_missing(method_name, *arguments, &block)

calls a class method.
So it should define as a singleton method of the module.