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: key_verifier.rb
    path of file: ./repos/light-service/lib/light-service/context
    
    the code of the file until where you have to start completion: module LightService
  class Context
    class KeyVerifier
      attr_reader :context, :action

      def init
    
      def self.verify_keys(context, action, &block)
        ReservedKeysVerifier.new(context, action).verify
        ExpectedKeyVerifier.new(context, action).verify

        block.call

        PromisedKeyVerifier.new(context, action).verify
      end