method 
 method_missing
 
 method_missing(name, *args, &block) public  Hide source   
 # File activerecord/lib/active_record/migration.rb, line 734 def method_missing(name, *args, &block) # :nodoc: nearest_delegate.send(name, *args, &block) end

 RSpec
RSpec Ruby on Rails
Ruby on Rails Ruby
Ruby 
  
  
  
  = protected
 = protected 