You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: missing.rb
    path of file: ./repos/cloudinary_gem/lib/cloudinary
    
    the code of the file until where you have to start completion: unless nil.respond_to?(:blank?)
  class Object
    def blank?
      respond_to?(:empty?) ? empty? : !self
 
    
    def present?
      !blank?
    end unless Object.instance_methods.include? :present?

    def presence
      self if present?
    end  unless Object.instance_methods.include? :presence
  end

  class NilClass #:nodoc:
    def blank?
      true
    end
  end